Infiniti Car 1998-05

Strut (MacPherson Strut) Assembly

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Raise and support the vehicle safely.
  4.  
  5. Remove or disconnect the following:

    Strut mounting bolt at the lower suspension member and the 3 nuts inside the engine compartment. Do not remove the piston rod locknut
     
    Strut assembly and place in a suitable holding device
     

  6.  
  7. Using a prybar to hold the upper spring mount, loosen but do not remove the piston rod locknut.
  8.  
  9. Compress the spring with a spring compressor so the strut mounting insulator can be turned by hand.

    Piston rod locknut
     
    Coil spring from strut assembly
     

  10.  

To install:

  1. Inspect all components carefully for damage or wear. Replace as necessary.
  2.  
  3. Install or connect the following:

    Compressed coil spring on the strut. Torque the locknut to 13-17 ft. lbs. (18-24 Nm).
     
    Strut. Ensure the bend in the lower strut bracket faces rearward on the left side and forward on the right side of the vehicle.
     
    Upper spring seat with the cutout facing the inside of the vehicle. Torque the upper mounting bolts to 31-40 ft. lbs. (42-54 Nm) and the lower through-bolt to 82-93 ft. lbs. (112-126 Nm). Final tightening must take place with the suspension loaded (vehicle at normal ride height).
     

  4.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Wheel. Matchmark the position of the strut-to-steering knuckle location
     
    Brake hose from the strut
     
    Anti-lock Brake System (ABS) wheel sensor and move it out of the way
     
    Bolts attaching the steering knuckle transverse link to the strut. Matchmark the assembly prior to removing the bolts
     
    Strut attaching nuts while holding the strut from inside the engine compartment
     

  4.  


CAUTION
Do not remove the center locknut from the strut assembly until the strut is safely compressed.



Strut from the vehicle
 

  1. Place the strut assembly in a vise with the special holding tool ST35652000 or in a spring compressor.
  2.  
  3. Loosen the piston rod locknut.
  4.  


CAUTION
Do not remove the piston rod locknut, the spring is under tension and can cause serious personal injury.

  1. Compress the spring with the spring compressor, then remove the piston rod locknut.
  2.  


NOTE
Before removing the strut from the coil spring, note the positioning of the strut in relationship to the coil spring for reassembly.



Strut mounting insulator bracket, strut mounting bearing, upper spring seat, and the upper spring rubber seat
 
Strut, leaving the coil spring compressed
 
Piston boot and rebound bumper from the strut
 

To install:

  1. Install or connect the following:

    Rebound bumper and the boot to the strut piston
     
    Strut into the coil spring, be sure the strut and spring are properly positioned
     
    Upper spring rubber seat, upper spring seat, strut mounting bearing, and the strut mounting insulator bracket. Be sure that the cutout on the upper spring seat is facing the outside of the vehicle.
     
    Piston rod locknut, then remove the spring compressor. Torque the piston rod locknut to 43-65 ft. lbs. (59-88 Nm) for I30 and I35 models, or to 40-47 ft. lbs. (54-65 Nm) for G35 models.
     
    Strut into the strut tower and install new attaching nuts. Torque the nuts to 29-40 ft. lbs. (39-54 Nm) for I30 models, to 32-38 ft. lbs. (43-51 Nm) for I35 models, or to 26-30 ft. lbs. (35-42 Nm) for G35 models.
     
    Bolts attaching the steering knuckle or transverse line to the strut and align the matchmarks. Torque the bolts to 103-117 ft. lbs. (140-159 Nm) for I30 models, to 130-139 ft. lbs. (176-189 Nm) for I35 models, or to 52-62 ft. lbs. (70-85 Nm) for G35 models.
     
    ABS wheel sensor. Torque the bolt to 13-17 ft. lbs. (18-24 Nm).
     
    Brake hose to the strut
     
    Front wheels and lower the vehicle
     

  2.  
  3. Check and/or adjust the wheel alignment as necessary.
  4.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Front wheel
     
    Brake caliper and rotor
     
    Wheel speed sensor harness
     
    Brake hose
     
    Stabilizer connecting rod
     
    Steering outer socket from strut
     
    Lower strut end from control arm
     
    Suspension actuator assemblies on Q45
     
    Strut damper and bracket
     
    Strut tower bar and bracket
     
    Upper mounting insulator bolts
     
    Strut assembly
     

  4.  
  5. Secure the strut in a suitable holding fixture.
  6.  
  7. Loosen the piston rod locknut. Do not remove the locknut.
  8.  
  9. Compress the spring with the proper tool so the strut assembly mounting insulator can be turned by hand.
  10.  
  11. Remove the piston rod locknut. Remove the spring assembly, dust cover and rubber seat. Remove the strut insert.
  12.  

To install:

  1. Inspect the rubber parts for deterioration. If the rubber is pulling away from the metal, the mounting insulator should be replaced.
  2.  
  3. Fit the spring into the lower seat and compress the spring.
  4.  
  5. Install the rubber seat, upper seat and mounting insulator.
  6.  
  7. Install or connect the following:

    Piston rod locknut and torque to 44-54 ft. lbs. (59-47 Nm).
     
    Strut into place and torque the upper mounting nuts to 26-31 ft. lbs. (34-42 Nm).
     
    Strut tower bar and bracket and torque the bolts to 26-31 ft. lbs. (34-42 Nm).
     
    Strut damper and bracket and torque the bolts to 11-13 ft. lbs. (15-19 Nm).
     
    Lower strut end to control arm
     
    Steering outer socket to strut
     
    Brake hose
     
    Wheel speed sensor harness
     
    Brake caliper and rotor
     
    Front wheel
     

  8.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Raise and support the vehicle safely.
  4.  
  5. Remove or disconnect the following:

    Strut mounting bolt at the lower suspension member and the 3 nuts inside the engine compartment. Do not remove the piston rod locknut
     
    Strut assembly and place in a suitable holding device
     

  6.  
  7. Using a prybar to hold the upper spring mount, loosen but do not remove the piston rod locknut.
  8.  
  9. Compress the spring with a spring compressor so the strut mounting insulator can be turned by hand.

    Piston rod locknut
     
    Coil spring from strut assembly
     

  10.  

To install:

  1. Inspect all components carefully for damage or wear. Replace as necessary.
  2.  
  3. Install or connect the following:

    Compressed coil spring on the strut. Torque the locknut to 13-17 ft. lbs. (18-24 Nm)
     
    Strut. Ensure the bend in the lower strut bracket faces rearward on the left side and forward on the right side of the vehicle
     
    Upper spring seat with the cutout facing the inside of the vehicle. Torque the upper mounting bolts to 31-40 ft. lbs. (42-54 Nm) and the lower through-bolt to 82-93 ft. lbs. (112-126 Nm). Final tightening must take place with the suspension loaded (vehicle at normal ride height)
     

  4.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:
    CAUTION
    Do not remove the center locknut from the strut assembly until the strut is safely compressed.



    Wheel. Matchmark the position of the strut-to-steering knuckle location
     
    Brake hose from the strut
     
    ABS wheel sensor and move it out of the way
     
    Bolts attaching the steering knuckle to the strut. Matchmark the assembly prior to removing the bolts
     
    Strut attaching nuts while holding the strut from inside the engine compartment
     



    Strut from the vehicle
     

  4.  
  5. Place the strut assembly in a vise with the special holding tool ST35652000 or in a spring compressor.
  6.  
  7. Loosen the piston rod locknut.
    CAUTION
    Do not remove the piston rod locknut, the spring is under tension and can cause serious personal injury.

  8.  
  9. Compress the spring with the spring compressor, then remove the piston rod locknut.
    NOTE
    Before removing the strut from the coil spring, note the positioning of the strut in relationship to the coil spring for reassembly.



    Strut mounting insulator bracket, strut mounting bearing, upper spring seat, and the upper spring rubber seat
     
    Strut, leaving the coil spring compressed
     
    Piston boot and rebound bumper from the strut
     

  10.  

To install:

  1. Install or connect the following:

    Rebound bumper and the boot to the strut piston
     
    Strut into the coil spring, be sure the strut and spring are properly positioned
     
    Upper spring rubber seat, upper spring seat, strut mounting bearing, and the strut mounting insulator bracket. Be sure that the cutout on the upper spring seat is facing the outside of the vehicle
     
    Piston rod locknut, then remove the spring compressor
     
    Torque the piston rod locknut to 43-65 ft. lbs. (59-88 Nm)
     
    Strut into the strut tower and install new attaching nuts. Torque the nuts to 29-40 ft. lbs. (39-54 Nm)
     
    Bolts attaching the steering knuckle to the strut and align the matchmarks. Torque the bolts to 103-117 ft. lbs. (140-159 Nm)
     
    ABS wheel sensor. Torque the bolt to 13-17 ft. lbs. (18-24 Nm)
     
    Brake hose to the strut
     
    Front wheels and lower the vehicle
     

  2.  
  3. Check and/or adjust the wheel alignment as necessary.
  4.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Raise and support the vehicle safely.
  4.  
  5. Remove or disconnect the following:

    Strut mounting bolt at the lower suspension member and the 3 nuts inside the engine compartment. Do not remove the piston rod locknut
     
    Strut assembly and place in a suitable holding device
     

  6.  
  7. Using a prybar to hold the upper spring mount, loosen but do not remove the piston rod locknut.
  8.  
  9. Compress the spring with a spring compressor so the strut mounting insulator can be turned by hand.

    Piston rod locknut
     
    Coil spring from strut assembly
     

  10.  

To install:

  1. Inspect all components carefully for damage or wear. Replace as necessary.
  2.  
  3. Install or connect the following:

    Compressed coil spring on the strut. Torque the locknut to 13-17 ft. lbs. (18-24 Nm)
     
    Strut. Ensure the bend in the lower strut bracket faces rearward on the left side and forward on the right side of the vehicle

    Click image to see an enlarged view

    Fig. Front strut assembly alignment-G20

     
    Upper spring seat with the cutout facing the inside of the vehicle. Torque the upper mounting bolts to 31-40 ft. lbs. (42-54 Nm) and the lower through-bolt to 82-93 ft. lbs. (112-126 Nm). Final tightening must take place with the suspension loaded (vehicle at normal ride height)
     

  4.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    CAUTION
    Do not remove the center locknut from the strut assembly until the strut is safely compressed.



    Wheel. Matchmark the position of the strut-to-steering knuckle location
     
    Brake hose from the strut
     
    ABS wheel sensor and move it out of the way
     
    Bolts attaching the steering knuckle to the strut. Matchmark the assembly prior to removing the bolts
     
    Strut attaching nuts while holding the strut from inside the engine compartment
     



    Strut from the vehicle
     

  4.  
  5. Place the strut assembly in a vise with the special holding tool ST35652000 or in a spring compressor.
  6.  
  7. Loosen the piston rod locknut.
    CAUTION
    Do not remove the piston rod locknut, the spring is under tension and can cause serious personal injury.

  8.  
  9. Compress the spring with the spring compressor, then remove the piston rod locknut.
    NOTE
    Before removing the strut from the coil spring, note the positioning of the strut in relationship to the coil spring for reassembly.



    Strut mounting insulator bracket, strut mounting bearing, upper spring seat, and the upper spring rubber seat
     
    Strut, leaving the coil spring compressed
     
    Piston boot and rebound bumper from the strut
     

  10.  

To install:

Click image to see an enlarged view

Fig. Front strut assembly alignment-I30

  1. Install or connect the following:

    Rebound bumper and the boot to the strut piston
     
    Strut into the coil spring, be sure the strut and spring are properly positioned
     
    Upper spring rubber seat, upper spring seat, strut mounting bearing, and the strut mounting insulator bracket. Be sure that the cutout on the upper spring seat is facing the outside of the vehicle
     
    Piston rod locknut, then remove the spring compressor
     
    Torque the piston rod locknut to 43-65 ft. lbs. (59-88 Nm)
     
    Strut into the strut tower and install new attaching nuts. Torque the nuts to 29-40 ft. lbs. (39-54 Nm)
     
    Bolts attaching the steering knuckle to the strut and align the matchmarks. Torque the bolts to 103-117 ft. lbs. (140-159 Nm)
     
    ABS wheel sensor. Torque the bolt to 13-17 ft. lbs. (18-24 Nm)
     
    Brake hose to the strut
     
    Front wheels and lower the vehicle
     

  2.  
  3. Check and/or adjust the wheel alignment as necessary.
  4.  



Click image to see an enlarged view

Fig. Front suspension components-2002 G20

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Raise and support the vehicle safely.
  4.  
  5. Remove or disconnect the following:

    Strut mounting bolt at the lower suspension member and the 3 nuts inside the engine compartment. Do not remove the piston rod locknut
     
    Strut assembly and place in a suitable holding device
     

  6.  
  7. Using a prybar to hold the upper spring mount, loosen but do not remove the piston rod locknut.
  8.  
  9. Compress the spring with a spring compressor so the strut mounting insulator can be turned by hand.

    Piston rod locknut
     
    Coil spring from strut assembly
     

  10.  

To install:

  1. Inspect all components carefully for damage or wear. Replace as necessary.
  2.  
  3. Install or connect the following:

    Compressed coil spring on the strut. Torque the locknut to 13-17 ft. lbs. (18-24 Nm).
     
    Strut. Ensure the bend in the lower strut bracket faces rearward on the left side and forward on the right side of the vehicle.
     
    Upper spring seat with the cutout facing the inside of the vehicle. Torque the upper mounting bolts to 31-40 ft. lbs. (42-54 Nm) and the lower through-bolt to 82-93 ft. lbs. (112-126 Nm). Final tightening must take place with the suspension loaded (vehicle at normal ride height).
     

  4.  



Click image to see an enlarged view

Fig. Front suspension components-2004-2005 Q45 and 2003-2004 M45

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Front wheel
     
    Brake caliper and rotor
     
    Wheel speed sensor harness
     
    Brake hose
     
    Stabilizer connecting rod
     
    Steering outer socket from strut
     
    Lower strut end from control arm
     
    Suspension actuator assemblies on Q45
     
    Strut damper and bracket
     
    Strut tower bar and bracket
     
    Upper mounting insulator bolts
     
    Strut assembly
     

  4.  
  5. Secure the strut in a suitable holding fixture.
  6.  
  7. Loosen the piston rod locknut. Do not remove the locknut.
  8.  
  9. Compress the spring with the proper tool so the strut assembly mounting insulator can be turned by hand.
  10.  
  11. Remove the piston rod locknut. Remove the spring assembly, dust cover and rubber seat. Remove the strut insert.
  12.  

To install:

  1. Inspect the rubber parts for deterioration. If the rubber is pulling away from the metal, the mounting insulator should be replaced.
  2.  
  3. Fit the spring into the lower seat and compress the spring.

    Click image to see an enlarged view

    Fig. Spring alignment-M45

  4.  
  5. Install the rubber seat, upper seat and mounting insulator.
  6.  
  7. Install or connect the following:

    Piston rod locknut and torque to 44-54 ft. lbs. (59-47 Nm).
     
    Strut into place and torque the upper mounting nuts to 26-31 ft. lbs. (34-42 Nm).
     
    Strut tower bar and bracket and torque the bolts to 26-31 ft. lbs. (34-42 Nm).
     
    Strut damper and bracket and torque the bolts to 11-13 ft. lbs. (15-19 Nm).
     
    Lower strut end to control arm
     
    Steering outer socket to strut
     
    Brake hose
     
    Wheel speed sensor harness
     
    Brake caliper and rotor
     
    Front wheel
     

  8.  
  9. Check and/or adjust the wheel alignment as necessary.
  10.  

2-Wheel Drive


Click image to see an enlarged view

Fig. Front suspension components-I35



Click image to see an enlarged view

Fig. Front suspension components-2WD G35

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    CAUTION
    Do not remove the center locknut from the strut assembly until the strut is safely compressed.



    Wheel. Matchmark the position of the strut-to-steering knuckle location
     
    Brake hose from the strut
     
    Anti-lock Brake System (ABS) wheel sensor and move it out of the way
     
    Bolts attaching the steering knuckle transverse link to the strut. Matchmark the assembly prior to removing the bolts
     
    Strut attaching nuts while holding the strut from inside the engine compartment
     



    Strut from the vehicle
     

  4.  
  5. Place the strut assembly in a vise with the special holding tool ST35652000 or in a spring compressor.
  6.  
  7. Loosen the piston rod locknut.
    CAUTION
    Do not remove the piston rod locknut, the spring is under tension and can cause serious personal injury.

  8.  
  9. Compress the spring with the spring compressor, then remove the piston rod locknut.
    NOTE
    Before removing the strut from the coil spring, note the positioning of the strut in relationship to the coil spring for reassembly.



    Strut mounting insulator bracket, strut mounting bearing, upper spring seat, and the upper spring rubber seat
     
    Strut, leaving the coil spring compressed
     
    Piston boot and rebound bumper from the strut
     

  10.  

To install:

  1. Install or connect the following:

    Rebound bumper and the boot to the strut piston
     
    Strut into the coil spring, be sure the strut and spring are properly positioned
     
    Upper spring rubber seat, upper spring seat, strut mounting bearing, and the strut mounting insulator bracket. Be sure that the cutout on the upper spring seat is facing the outside of the vehicle.
     
    Piston rod locknut, then remove the spring compressor. Torque the piston rod locknut to 43-65 ft. lbs. (59-88 Nm) I35 models, or to 40-47 ft. lbs. (54-65 Nm) for G35 models.
     
    Strut into the strut tower and install new attaching nuts. Torque the nuts to 32-38 ft. lbs. (43-51 Nm) for I35 models, or to 28 ft. lbs. (38.5 Nm) for G35 models.
     
    Bolts attaching the steering knuckle or transverse link to the strut and align the matchmarks. Torque the bolts to 130-139 ft. lbs. (176-189 Nm) for I35 models, or to 79 ft. lbs. (107 Nm) for G35 models.
     
    ABS wheel sensor. Torque the bolt to 13-17 ft. lbs. (18-24 Nm).
     
    Brake hose to the strut
     
    Front wheels and lower the vehicle
     

  2.  
  3. Check and/or adjust the wheel alignment as necessary.

    Click image to see an enlarged view

    Fig. Spring alignment-G35



    Click image to see an enlarged view

    Fig. Spring alignment-I35

  4.  

Active Suspension

NOTE
The Nissan Consult or a scan tool that can issue commands to the control unit is required for bleeding the hydraulics in the Full Active Suspension system.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the hydraulic pressure as follows:
    1. Raise all 4 wheels off the ground and wait at least 3 minutes for the system to stabilize.
    2.  
    3. Remove both front inner fenders and the rear pressure control unit cover.
    4.  
    5. Loosen the locknut and slowly open the bypass valve on each pressure control unit. Open the valves all the way and leave them open until the job is finished.
    6.  

  4.  
  5. Remove the flange joint from the top of the actuator.
  6.  
  7. Install 2, 15mm bolts into the actuator in the flange joint mounting bolt holes.
  8.  
  9. Insert a bar between the bolts and loosen the joint adapter. Do not remove it yet.
  10.  
  11. Remove or disconnect the following:

    Upper mount insulator nuts
     
    Hydraulic lines, then cap the lines to keep the system clean
     
    Lower actuator mounting nut and remove the assembly
     

  12.  
  13. Secure the actuator/spring assembly in a suitable holding fixture. Scribe alignment marks on the spring, upper mount insulator and actuator unit.
  14.  
  15. Compress the spring with the proper tool so the joint adapter can be turned by hand. Remove the joint adapter and lift off the mount insulator, spring, and any other components necessary.
  16.  

To install:

  1. If the actuator is being replaced, the rubber bumper should also be replaced. Fit the bumper, dust cover and rubber seat onto the actuator.
  2.  
  3. Fit the spring into the lower seat with the matchmarks aligned. Install the upper seat/mounting insulator with the marks aligned and start the joint adapter. The joint adapter will be tightened after installing the actuator assembly.
  4.  
  5. Fit the strut into place and torque the upper mounting nuts to 30-41 ft. lbs. (40-55 Nm).
  6.  
  7. Torque the lower mounting bolt to 76-94 ft. lbs. (103-128 Nm).
  8.  
  9. Torque the joint adapter to 63-72 ft. lbs. (85-98 Nm).
  10.  
  11. Install the flange adapter and torque the bolts to 11-13 ft. lbs. (15-18 Nm).
  12.  
  13. Close the bypass valves on the pressure control units.
  14.  
  15. Bleed the system as follows:
    1. With all 4 wheels about 2 in. (50mm) off the ground, run the engine for about 2 minutes.
    2.  
    3. Connect the Consult scan tool and enter "WORK SUPPORT" mode. Select "4. AIR BLEEDING".
    4.  
    5. Check the fluid level in the reservoir. It should be slightly overfilled.
    6.  
    7. Touch "START" on the scan tool. The display will show a regular rise and fall in system pressure. When the pressure stabilizes, stop the engine.
    8.  
    9. Connect a clear tube to the air bleeder at the actuator and place the other end in a container.
    10.  

  16.  


NOTE
Do not allow the fluid to contact the body or the paint will be damaged.

  1. Open the bleeder and watch the fluid move through the tube. If there are still air bubbles in the fluid when the flow stops, check the fluid level, pressurize the system again and repeat the process.
  2.  


NOTE
The Nissan Consult or a scan tool that can issue commands to the control unit is required for bleeding the hydraulics in the Full Active Suspension system.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Relieve the hydraulic pressure as follows:
    1. Raise all 4 wheels off the ground and wait at least 3 minutes for the system to stabilize.
    2.  
    3. Remove both front inner fenders and the rear pressure control unit cover.
    4.  
    5. Loosen the locknut and slowly open the bypass valve on each pressure control unit. Open the valves all the way and leave them open until the job is finished.
    6.  

  4.  
  5. Remove the flange joint from the top of the actuator.
  6.  
  7. Install 2, 15mm bolts into the actuator in the flange joint mounting bolt holes.
  8.  
  9. Insert a bar between the bolts and loosen the joint adapter. Do not remove it yet.
  10.  
  11. Remove the upper mount insulator nuts.
  12.  
  13. Disconnect the hydraulic lines. Cap the lines to keep the system clean.
  14.  
  15. Remove the lower actuator mounting nut and remove the assembly.
  16.  
  17. Secure the actuator/spring assembly in a suitable holding fixture. Scribe alignment marks on the spring, upper mount insulator and actuator unit.
  18.  
  19. Compress the spring with the proper tool so the joint adapter can be turned by hand. Remove the joint adapter and lift off the mount insulator, spring, and any other components necessary.
  20.  

To install:

  1. If the actuator is being replaced, the rubber bumper should also be replaced. Fit the bumper, dust cover and rubber seat onto the actuator.
  2.  
  3. Fit the spring into the lower seat with the matchmarks aligned. Install the upper seat/mounting insulator with the marks aligned and start the joint adapter. The joint adapter will be tightened after installing the actuator assembly.
  4.  
  5. Fit the strut into place and torque the upper mounting nuts to 30-41 ft. lbs. (40-55 Nm).
  6.  
  7. Torque the lower mounting bolt to 76-94 ft. lbs. (103-128 Nm).
  8.  
  9. Torque the joint adapter to 63-72 ft. lbs. (85-98 Nm).
  10.  
  11. Install the flange adapter and torque the bolts to 11-13 ft. lbs. (15-18 Nm).
  12.  
  13. Close the bypass valves on the pressure control units.
  14.  
  15. Bleed the system as follows:
    1. With all 4 wheels about 2 in. (50mm) off the ground, run the engine for about 2 minutes.
    2.  
    3. Connect the Consult scan tool and enter "WORK SUPPORT" mode. Select "4. AIR BLEEDING".
    4.  
    5. Check the fluid level in the reservoir. It should be slightly overfilled.
    6.  
    7. Touch "START" on the scan tool. The display will show a regular rise and fall in system pressure. When the pressure stabilizes, stop the engine.
    8.  
    9. Connect a clear tube to the air bleeder at the actuator and place the other end in a container.
      NOTE
      Do not allow the fluid to contact the body or the paint will be damaged.

    10.  
    11. Open the bleeder and watch the fluid move through the tube. If there are still air bubbles in the fluid when the flow stops, check the fluid level, pressurize the system again and repeat the process.
    12.  

  16.  


NOTE
The Nissan Consult or a scan tool that can issue commands to the control unit is required for bleeding the hydraulics in the Full Active Suspension system.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the hydraulic pressure as follows:
    1. Raise all 4 wheels off the ground and wait at least 3 minutes for the system to stabilize.
    2.  
    3. Remove both front inner fenders and the rear pressure control unit cover.
    4.  
    5. Loosen the locknut and slowly open the bypass valve on each pressure control unit. Open the valves all the way and leave them open until the job is finished.
    6.  

  4.  
  5. Remove the flange joint from the top of the actuator.
  6.  
  7. Install 2, 15mm bolts into the actuator in the flange joint mounting bolt holes.
  8.  
  9. Insert a bar between the bolts and loosen the joint adapter. Do not remove it yet.
  10.  
  11. Remove the upper mount insulator nuts.
  12.  
  13. Disconnect the hydraulic lines. Cap the lines to keep the system clean.
  14.  
  15. Remove the lower actuator mounting nut and remove the assembly.
  16.  
  17. Secure the actuator/spring assembly in a suitable holding fixture. Scribe alignment marks on the spring, upper mount insulator and actuator unit.
  18.  
  19. Compress the spring with the proper tool so the joint adapter can be turned by hand. Remove the joint adapter and lift off the mount insulator, spring, and any other components necessary.
  20.  

To install:

  1. If the actuator is being replaced, the rubber bumper should also be replaced. Fit the bumper, dust cover and rubber seat onto the actuator.
  2.  
  3. Fit the spring into the lower seat with the matchmarks aligned. Install the upper seat/mounting insulator with the marks aligned and start the joint adapter. The joint adapter will be tightened after installing the actuator assembly.
  4.  
  5. Fit the strut into place and torque the upper mounting nuts to 30-41 ft. lbs. (40-55 Nm).
  6.  
  7. Torque the lower mounting bolt to 76-94 ft. lbs. (103-128 Nm).
  8.  
  9. Torque the joint adapter to 63-72 ft. lbs. (85-98 Nm).
  10.  
  11. Install the flange adapter and torque the bolts to 11-13 ft. lbs. (15-18 Nm).
  12.  
  13. Close the bypass valves on the pressure control units.
  14.  
  15. Bleed the system as follows:
    1. With all 4 wheels about 2 in. (50mm) off the ground, run the engine for about 2 minutes.
    2.  
    3. Connect the Consult scan tool and enter "WORK SUPPORT" mode. Select "4. AIR BLEEDING".
    4.  
    5. Check the fluid level in the reservoir. It should be slightly overfilled.
    6.  
    7. Touch "START" on the scan tool. The display will show a regular rise and fall in system pressure. When the pressure stabilizes, stop the engine.
    8.  
    9. Connect a clear tube to the air bleeder at the actuator and place the other end in a container.
      NOTE
      Do not allow the fluid to contact the body or the paint will be damaged.

    10.  
    11. Open the bleeder and watch the fluid move through the tube. If there are still air bubbles in the fluid when the flow stops, check the fluid level, pressurize the system again and repeat the process.
    12.  

  16.  


NOTE
The Nissan Consult or a scan tool that can issue commands to the control unit is required for bleeding the hydraulics in the Full Active Suspension system.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the hydraulic pressure as follows:
    1. Raise all 4 wheels off the ground and wait at least 3 minutes for the system to stabilize.
    2.  
    3. Remove both front inner fenders and the rear pressure control unit cover.
    4.  
    5. Loosen the locknut and slowly open the bypass valve on each pressure control unit. Open the valves all the way and leave them open until the job is finished.
    6.  

  4.  
  5. Remove the flange joint from the top of the actuator.
  6.  
  7. Install 2, 15mm bolts into the actuator in the flange joint mounting bolt holes.
  8.  
  9. Insert a bar between the bolts and loosen the joint adapter. Do not remove it yet.
  10.  
  11. Remove or disconnect the following:

    Upper mount insulator nuts
     
    Hydraulic lines, then cap the lines to keep the system clean
     
    Lower actuator mounting nut and remove the assembly
     

  12.  
  13. Secure the actuator/spring assembly in a suitable holding fixture. Scribe alignment marks on the spring, upper mount insulator and actuator unit.
  14.  
  15. Compress the spring with the proper tool so the joint adapter can be turned by hand. Remove the joint adapter and lift off the mount insulator, spring, and any other components necessary.
  16.  

To install:

  1. If the actuator is being replaced, the rubber bumper should also be replaced. Fit the bumper, dust cover and rubber seat onto the actuator.
  2.  
  3. Fit the spring into the lower seat with the matchmarks aligned. Install the upper seat/mounting insulator with the marks aligned and start the joint adapter. The joint adapter will be tightened after installing the actuator assembly.
  4.  
  5. Fit the strut into place and torque the upper mounting nuts to 30-41 ft. lbs. (40-55 Nm).
  6.  
  7. Torque the lower mounting bolt to 76-94 ft. lbs. (103-128 Nm).
  8.  
  9. Torque the joint adapter to 63-72 ft. lbs. (85-98 Nm).
  10.  
  11. Install the flange adapter and torque the bolts to 11-13 ft. lbs. (15-18 Nm).
  12.  
  13. Close the bypass valves on the pressure control units.
  14.  
  15. Bleed the system as follows:
    1. With all 4 wheels about 2 in. (50mm) off the ground, run the engine for about 2 minutes.
    2.  
    3. Connect the Consult scan tool and enter "WORK SUPPORT" mode. Select "4. AIR BLEEDING".
    4.  
    5. Check the fluid level in the reservoir. It should be slightly overfilled.
    6.  
    7. Touch "START" on the scan tool. The display will show a regular rise and fall in system pressure. When the pressure stabilizes, stop the engine.
    8.  
    9. Connect a clear tube to the air bleeder at the actuator and place the other end in a container.
      NOTE
      Do not allow the fluid to contact the body or the paint will be damaged.

    10.  
    11. Open the bleeder and watch the fluid move through the tube. If there are still air bubbles in the fluid when the flow stops, check the fluid level, pressurize the system again and repeat the process.
    12.  

  16.  
  17. Check and/or adjust the wheel alignment as necessary.
  18.  

All Wheel Drive


Click image to see an enlarged view

Fig. Front suspension components-AWD G35

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Front wheels
     
    Engine undercover
     
    ABS (antilock brake sensor) sensor harness
     
    Brake hose mounting bracket
     
    Strut attachment (shock absorber arm) from lower control arm
     
    Upper strut mounting nuts
     

  4.  
  5. Remove strut assembly from vehicle
  6.  
  7. Place the strut assembly in a vise with the special holding tool ST35652000 or in a spring compressor.
  8.  
  9. Loosen the piston rod locknut.
    CAUTION
    Do not remove the piston rod locknut, the spring is under tension and can cause serious personal injury.

  10.  
  11. Compress the spring with the spring compressor, then remove the piston rod locknut.
    NOTE
    Before removing the strut from the coil spring, note the positioning of the strut in relationship to the coil spring for reassembly.



    Strut mounting insulator bracket, strut mounting bearing, upper spring seat, and the upper spring rubber seat
     
    Strut, leaving the coil spring compressed
     
    Piston boot and rebound bumper from the strut
     
    Strut attachment (shock absorber arm) from shock absorber
     

  12.  

To install:

  1. Installation is in reverse order of removal. Observe the following:

    Install coil spring with large diameter up and small diameter down
     
    Make certain coil spring is securely seated in spring mounting groove of spring upper seat
     
    Tighten strut attachment (shock absorber arm) bolt to 42-51 ft. lbs. (56-70 Nm)
     
    Tighten strut attachment-to-lower control arm nut to 93-107 ft. lbs. (126-146 Nm)
     
    Tighten shock absorber piston nut to 40-47 ft. lbs. (54-65 Nm)
     
    Tighten mounting insulator nuts to 26-30 ft. lbs. (35-42 Nm)
     

  2.  
  3. Check and/or adjust the wheel alignment as necessary.
  4.  

Standard Suspension
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Front wheel
     
    Brake caliper and rotor
     
    Tie rod ball joint and lower ball joint with tool ST29020001
     
    Stabilizer connecting rod upper nut and separate the strut from the connecting rod
     
    Upper mounting insulator bolts
     
    Strut assembly
     

  4.  
  5. Secure the strut in a suitable holding fixture.
  6.  
  7. Loosen the piston rod locknut. Do not remove the locknut.
  8.  
  9. Compress the spring with the proper tool so the strut assembly mounting insulator can be turned by hand.
  10.  
  11. Remove the piston rod locknut. Remove the spring assembly, dust cover and rubber seat. Remove the strut insert.
  12.  

To install:

  1. Inspect the rubber parts for deterioration. If the rubber is pulling away from the metal, the mounting insulator should be replaced.
  2.  
  3. Fit the spring into the lower seat, install the dust cover/bumper and upper seat and mounting insulator.
  4.  
  5. Install or connect the following:

    Piston rod locknut and torque to 13-17 ft. lbs. (17-23 Nm).
     
    Strut into place and torque the upper mounting nuts to 30-35 ft. lbs. (40-47 Nm).
     

  6.  
  7. Torque the lower mounting bolt to 80-94 ft. lbs. (108-128 Nm).

    Brake rotor and caliper
     
    Front wheel
     

  8.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Front wheel
     
    Brake caliper and rotor
     
    Tie rod ball joint and lower ball joint with tool ST29020001
     
    Stabilizer connecting rod upper nut and separate the strut from the connecting rod
     

  4.  
  5. Remove the upper mounting insulator bolts.
  6.  
  7. Strut assembly
  8.  
  9. Secure the strut in a suitable holding fixture.
  10.  
  11. Loosen the piston rod locknut. Do not remove the locknut.
  12.  
  13. Compress the spring with the proper tool so the strut assembly mounting insulator can be turned by hand.
  14.  
  15. Remove the piston rod locknut. Remove the spring assembly, dust cover and rubber seat. Remove the strut insert.
  16.  

To install:

  1. Inspect the rubber parts for deterioration. If the rubber is pulling away from the metal, the mounting insulator should be replaced.
  2.  
  3. Fit the spring into the lower seat, install the dust cover/bumper and upper seat and mounting insulator.
  4.  
  5. Install the piston rod locknut and torque to 13-17 ft. lbs. (17-23 Nm).
  6.  
  7. Fit the strut into place and torque the upper mounting nuts to 30-35 ft. lbs. (40-47 Nm).
  8.  
  9. Torque the lower mounting bolt to 80-94 ft. lbs. (108-128 Nm).
  10.  
  11. Install the brake rotor and caliper.
  12.  
  13. Install the front wheel.
  14.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Front wheel
     
    Brake caliper and rotor
     
    Tie rod ball joint and lower ball joint with tool ST29020001
     
    Stabilizer connecting rod upper nut and separate the strut from the connecting rod
     

  4.  
  5. Remove the upper mounting insulator bolts.
  6.  
  7. Strut assembly
  8.  
  9. Secure the strut in a suitable holding fixture.
  10.  
  11. Loosen the piston rod locknut. Do not remove the locknut.
  12.  
  13. Compress the spring with the proper tool so the strut assembly mounting insulator can be turned by hand.
  14.  
  15. Remove the piston rod locknut. Remove the spring assembly, dust cover and rubber seat. Remove the strut insert.
  16.  

To install:

  1. Inspect the rubber parts for deterioration. If the rubber is pulling away from the metal, the mounting insulator should be replaced.
  2.  
  3. Fit the spring into the lower seat, install the dust cover/bumper and upper seat and mounting insulator.
  4.  
  5. Install the piston rod locknut and torque to 13-17 ft. lbs. (17-23 Nm).
  6.  
  7. Fit the strut into place and torque the upper mounting nuts to 30-35 ft. lbs. (40-47 Nm).
  8.  
  9. Torque the lower mounting bolt to 80-94 ft. lbs. (108-128 Nm).
  10.  
  11. Install the brake rotor and caliper.
  12.  
  13. Install the front wheel.
  14.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Front wheel
     
    Brake caliper and rotor
     
    Tie rod ball joint and lower ball joint with tool ST29020001
     
    Stabilizer connecting rod upper nut and separate the strut from the connecting rod
     
    Upper mounting insulator bolts
     
    Strut assembly
     

  4.  
  5. Secure the strut in a suitable holding fixture.
  6.  
  7. Loosen the piston rod locknut. Do not remove the locknut.
  8.  
  9. Compress the spring with the proper tool so the strut assembly mounting insulator can be turned by hand.
  10.  
  11. Remove the piston rod locknut. Remove the spring assembly, dust cover and rubber seat. Remove the strut insert.
  12.  

To install:

  1. Inspect the rubber parts for deterioration. If the rubber is pulling away from the metal, the mounting insulator should be replaced.
  2.  
  3. Fit the spring into the lower seat, install the dust cover/bumper and upper seat and mounting insulator.
  4.  
  5. Install or connect the following:

    Piston rod locknut and torque to 13-17 ft. lbs. (17-23 Nm).
     
    Strut into place and torque the upper mounting nuts to 30-35 ft. lbs. (40-47 Nm).
     

  6.  
  7. Torque the lower mounting bolt to 80-94 ft. lbs. (108-128 Nm).

    Brake rotor and caliper
     
    Front wheel
     

  8.  
  9. Check and/or adjust the wheel alignment as necessary.

    Click image to see an enlarged view

    Fig. Front suspension components-2002-2003 Q45



    Click image to see an enlarged view

    Fig. Spring alignment-2001-2005 Q45

  10.  

 
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