Lexus Car ES, IS, LS 1998-06

Strut (MacPherson Strut) Assembly

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Removal & Installation



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

    Tire and wheel assembly
     
    Load sensing proportioning valve spring assembly from the lower arm
     
    Anti-lock Brake System (ABS) speed sensor harness and brake line from the strut assembly
     
    Stabilizer bar link from the strut
     

  4.  
  5. Loosen the 2 nuts attaching the strut to the axle carrier.
  6.  
  7. Support the axle carrier.
  8.  
  9. Remove or disconnect the following:

    Rear seat back and package tray trim
     
    Upper mounting nuts
     
    2 lower mounting bolts and remove the strut assembly
     

  10.  
  11. Compress the coil spring.
  12.  
  13. Temporarily install a bolt and 2 nuts on the bracket at the lower end of the strut and secure it in a vise.
  14.  
  15. Secure the upper support and remove the strut rod retaining nut.
  16.  
  17. Remove or disconnect the following:

    Upper suspension support
     
    Upper insulator
     
    Coil spring
     
    Spring bumper
     
    Lower insulator
     

  18.  
  19. If discarding the strut, perform the following:
    1. Fully extend the strut rod.
    2.  
    3. Drill a hole in the side of the strut to release the gas.
    4.  

  20.  


WARNING
The gas coming out is harmless, but be careful of chips which may fly up while drilling.



Click image to see an enlarged view

Fig. Exploded view of the rear strut and coil spring mounting-ES 300

To install:

  1. Install or connect the following:

    Lower insulator to the strut
     
    Spring bumper to the strut piston rod
     
    Compressed coil spring
     
    Coil spring with the end butted against the gap in the lower seat
     


    Click image to see an enlarged view

    Fig. Position the upper suspension support as shown when assembling the strut-ES 300

    Upper insulator and support matching the bolt of the support with the cut-off part of the insulator
     
    Upper suspension support
     
    New strut piston rod nut to 36 ft. lbs. (49 Nm)
     
    Spring compressor
     
    Strut rod piston nut cap
     
    Strut and tighten the 3 nuts to 29 ft. lbs. (39 Nm)
     
    Strut to the axle carrier. Coat the nuts with engine oil and tighten the nuts and bolts to 188 ft. lbs. (255 Nm)
     
    ABS harness to the strut and tighten the bolt to 48 inch lbs. (6 Nm)
     
    Brake line to the strut and tighten the retaining nut to 22 ft. lbs. (29 Nm)
     
    Spring to the lower arm and tighten the nut to 10 ft. lbs. (13 Nm)
     
    LSPV to the lower arm and tighten the nut to 108 inch lbs. (12 Nm)
     
    Rear wheel
     
    Rear seat and package tray
     

  2.  



Click image to see an enlarged view

Fig. Exploded view, rear suspension-ES 330



Click image to see an enlarged view

Fig. Exploded view, Roof headlining assembly-ES 330

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Raise the rear of the vehicle and support it with safety stands.
  4.  
  5. Remove or disconnect the following: Rear wheels

    Rear seat cushion and seat back
     
    Rood side garnish
     
    Door opening weather strip trim
     
    Center stop light assembly (w/o sun shade)
     
    Rear shoulder belt cover
     
    Package tray trim panel
     
    Rear seat 3 point seat belt outer assembly
     
    Rear stabilizer bar link
     
    Rear suspension support No. 1 cover
     
    2 bolts for brake flex hose and ABS wire harness
     
    Loosen 2 bolts on lower shock absorber
     
    Loosen center support nut. Do NOT remove
     
    3 nuts from center suspension support
     
    Lower rear axle carrier and remove the 2 bolts loosened earlier
     
    Rear shock absorber and coil assembly
     

  6.  
  7. Remove the shock from the assembly
  8.  


WARNING
Using a suitable coil spring compressor, compress the coil spring before removing the following components

  1. Remove or disconnect the following:

    Nut on suspension support previously loosened
     
    Collar, suspension support assembly, spring bumper and coil spring.
     
    Lower insulator
     

  2.  

To install:

  1. Install the shock absorber in assembly
  2.  


WARNING
Using a suitable coil spring compressor, compress the coil spring before installing the following components

  1. Install or connect the following:

    Spring into the spring seat
     

  2.  


NOTE
Make certain that spring seats properly in the seat



Lower insulator, coil spring, suspension support assembly, collar
 
Temporarily install center nut
 


NOTE
Align the suspension support with the shock absorber lower bracket



Click image to see an enlarged view

Fig. Aligning support bracket-ES 330

  1. Release and remove the coil spring compressor
  2.  
  3. Install rear shock absorber with spring (Strut)
  4.  
  5. Install or connect the following:

    3 nuts attaching the spring support to 29 ft. lbs (39 Nm)
     
    2 bolts attaching sock to the rear axle carrier assembly to 188 ft. lbs. (255 Nm)
     
    Flex hose and ABS speed sensor wire harness
     
    Center nut on suspension support to 36 ft. lbs. (49 Nm)
     
    Rear suspension support cover
     
    Rear stabilizer link to 29 ft. lbs. (39 Nm)
     
    Rear wheels
     
    Reinstall interior components in reverse order of removal
     

  6.  
  7. Inspect and align the rear wheels
  8.  

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

    Tire and wheel assembly
     
    Load sensing proportioning valve spring assembly from the lower arm.
     
    Anti-lock Brake System (ABS) speed sensor harness and brake line from the strut assembly.
     
    Stabilizer bar link from the strut.
     

  4.  
  5. Loosen the 2 nuts attaching the strut to the axle carrier.
  6.  
  7. Support the axle carrier.
  8.  
  9. Remove or disconnect the following:

    Rear seat back and package tray trim.
     
    Upper mounting nuts.
     
    2 lower mounting bolts and remove the strut assembly.
     

  10.  
  11. Compress the coil spring.
  12.  
  13. Temporarily install a bolt and 2 nuts on the bracket at the lower end of the strut and secure it in a vise.
  14.  
  15. Secure the upper support and remove the strut rod retaining nut.
  16.  
  17. Remove or disconnect the following:

    Upper suspension support
     
    Upper insulator
     
    Coil spring
     
    Spring bumper
     
    Lower insulator
     

  18.  
  19. If discarding the strut, perform the following:
    1. Fully extend the strut rod.
    2.  
    3. Drill a hole in the side of the strut to release the gas.
      WARNING
      The gas coming out is harmless, but be careful of chips which may fly up while drilling.



      Click image to see an enlarged view

      Fig. Exploded view of the rear strut and coil spring mounting-ES300

    4.  

  20.  

To install:

  1. Install or connect the following:

    Lower insulator to the strut.
     
    Spring bumper to the strut piston rod.
     
    Compressed coil spring.
     
    Coil spring with the end butted against the gap in the lower seat

    Click image to see an enlarged view

    Fig. Position the upper suspension support as shown when assembling the strut-ES300

     
    Upper insulator and support matching the bolt of the support with the cut-off part of the insulator.
     
    Upper suspension support
     
    New strut piston rod nut to 36 ft. lbs. (49 Nm)
     
    Spring compressor
     
    Strut rod piston nut cap
     
    Strut and tighten the 3 nuts to 29 ft. lbs. (39 Nm).
     
    Strut to the axle carrier. Coat the nuts with engine oil and tighten the nuts and bolts to 188 ft. lbs. (255 Nm).
     
    ABS harness to the strut and tighten the bolt to 48 inch lbs. (6 Nm).
     
    Brake line to the strut and tighten the retaining nut to 22 ft. lbs. (29 Nm).
     
    Spring to the lower arm and tighten the nut to 10 ft. lbs. (13 Nm).
     
    LSPV to the lower arm. Tighten the nut to 108 inch lbs. (12 Nm).
     
    Rear wheel
     
    Rear seat and package tray
     

  2.  

With Air Suspension


Click image to see an enlarged view

Fig. Pneumatic cylinder (strut) component overview (air suspension)

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Bleed the air system from the suspension.
  4.  
  5. Remove or disconnect the following:

    Rear seat cushion and seat back
     
    Package tray trim
     
    Trunk trim panel. Move the height control switch, located in the trunk area, to theOFF
     
    Tire and wheel assembly
     
    Rear halfshaft
     
    Stabilizer links from the stabilizer bar
     
    Anti-lock Brake System (ABS) speed sensor and wiring harness
     
    Brake caliper bracket from the rear axle carrier. Do NOT disconnect the brake line.
     

  6.  
  7. Place matchmarks on the height control sensor link and bracket. Disconnect the height control sensor link from the No. 1 lower control arm.
  8.  
  9. Support the rear axle assembly with a lifting device.
  10.  
  11. Remove or disconnect the following:

    Nut on the lower side of the shock absorber. Do NOT remove the bolt.
     
    Grommet and disconnect the air tube from the shock absorber
     
    Actuator cover from the strut tower by removing the 3 nuts
     
    Actuator electrical connector from the top of the strut
     
    Actuator by removing the 2 nuts
     
    3 upper mounting nuts holding the strut to the strut tower
     

  12.  
  13. Lower the rear axle assembly
  14.  
  15. Remove or disconnect the following:

    Bolt on the lower side of the shock absorber
     
    Pneumatic cylinder strut assembly from the vehicle
     
    Suspension support from the strut assembly by removing the 3 nuts
     

  16.  
  17. If discarding the pneumatic cylinder, perform the following:
    1. Using a screwdriver, depressurize the air from inside the cylinder.
    2.  
    3. Drill a hole in the shaded area shown in the illustration and remove the gas inside.
    4.  

  18.  


CAUTION
The gas coming out is harmless, but be careful of chips which may fly up when drilling.

To install:

  1. Install or connect the following:

    Suspension support to the pneumatic cylinder (strut) and tighten the nuts to 27 ft. lbs. (36 Nm)
     
    Strut assembly to the vehicle and tighten the upper mounting nuts to 47 ft. lbs. (64 Nm)
     

  2.  
  3. Match the holes in the pneumatic cylinder with the holes in the suspension control actuator.
  4.  
  5. Install or connect the following:

    Actuator and tighten the mounting nuts to 69 inch lbs. (8 Nm)
     
    Actuator cover and tighten the 3 nuts to 18 ft. lbs. (25 Nm)
     
    New O-rings and connect the air line to the shock absorber. Tighten the fitting to 13 ft. lbs. (18 Nm).
     
    Strut to the rear axle carrier. Insert the bolt from the vehicle's rear and temporarily tighten the nut.
     
    Height control sensor link to the No. 1 lower control arm. Mounting nut: 48 inch lbs. (5 Nm).
     
    Rear brake caliper to the rear axle carrier and tighten the mounting bolts to 77 ft. lbs. (104 Nm)
     
    ABS speed sensor and wiring harness
     
    Stabilizer bar link and tighten the nut to 48 ft. lbs. (65 Nm)
     
    Halfshaft
     
    Actuator electrical connector to the top of the strut
     
    Tire
     

  6.  
  7. Move the height control switch to theON
  8.  
  9. Bounce the vehicle up and down several times to stabilize the suspension.
  10.  
  11. Turn the suspension height control to theOFF
  12.  
  13. Remove the tire and wheel assembly.
  14.  
  15. Support the rear axle carrier with a lifting device. Tighten the lower strut bolt to 101 ft. lbs. (137 Nm).
  16.  
  17. Install or connect the following:

    Package tray trim
     
    Rear seat cushion and seat back
     

  18.  
  19. Turn the suspension control switch to theON
  20.  
  21. Check the wheel alignment.
  22.  



Click image to see an enlarged view

Fig. Expanded view rear suspension-LS 430

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Bleed the air system from the suspension.
  4.  
  5. Remove or disconnect the following:

    Rear seat cushion and seat back
     
    Scuff plates
     
    Door opening weather strip
     
    Rear seat side covers
     
    Roof side garnish
     
    Center stop light assembly
     
    Package tray trim
     
    Tire and wheel assembly
     
    3 nuts and remove strut cap
     
    Turn control actuator clockwise 40 degrees and remove
     

  6.  
  7. Remove shock absorber cylinder assembly

    Support rear axle carrier with jack
     
    Rear tire house cover
     
    Air tube
     
    3 upper nuts on assembly
     
    Lower side nut
     
    Lower assembly
     
    O-rings
     

  8.  

To install:

  1. Install or connect the following:

    2 new O-rings and install connector No 2
     
    Temporarily install lower side nut
     
    Raise axle carrier and install air tube
     
    Control actuator until response is felt, turn approx. 40 degrees
     
    Control arm connector
     
    Shock absorber cap with 3 nuts. Tighten to 18 ft. lbs (25 Nm)
     

  2.  


NOTE
Start engine and allow air struts to fill. Checks for leaks



Rear wheels
 


NOTE
Lower vehicle until all wheels are on the ground. Jounce several times to stabilize.

  1. Remove the rear wheel and support
  2.  
  3. Jack up the rear axle carrier
  4.  
  5. Install or connect the following:

    Tighten the lower nut. Tighten to 52 ft. lbs. (70 Nm)
     
    Rear wheel
     

  6.  
  7. Adjust vehicle height
  8.  
  9. Adjust rear wheel alignment.
  10.  



Click image to see an enlarged view

Fig. Pneumatic cylinder (strut) component overview (air suspension)

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Bleed the air system from the suspension.
  4.  
  5. Remove or disconnect the following:

    Rear seat cushion and seat back
     
    Package tray trim
     
    Trunk trim panel. Move the height control switch, located in the trunk area, to the OFF position.
     
    Tire and wheel assembly
     
    Rear halfshaft
     
    Stabilizer links from the stabilizer bar
     
    Anti-lock Brake System (ABS) speed sensor and wiring harness
     
    Brake caliper bracket from the rear axle carrier. Do not disconnect the brake line.
     

  6.  
  7. Place matchmarks on the height control sensor link and bracket. Disconnect the height control sensor link from the No. 1 lower control arm.
  8.  
  9. Support the rear axle assembly with a lifting device.
  10.  
  11. Remove or disconnect the following:

    Nut on the lower side of the shock absorber. Do not remove the bolt.
     
    Grommet and disconnect the air tube from the shock absorber.
     
    Actuator cover from the strut tower by removing the 3 nuts.
     
    Actuator electrical connector from the top of the strut.
     
    Actuator by removing the 2 nuts
     
    3 upper mounting nuts holding the strut to the strut tower.
     

  12.  
  13. Lower the rear axle assembly
  14.  
  15. Remove or disconnect the following:

    Bolt on the lower side of the shock absorber.
     
    Pneumatic cylinder strut assembly from the vehicle.
     
    Suspension support from the strut assembly by removing the 3 nuts.
     

  16.  
  17. If discarding the pneumatic cylinder, perform the following:
    1. Using a screwdriver, depressurize the air from inside the cylinder.
    2.  
    3. Drill a hole in the shaded area shown in the illustration and remove the gas inside.
      CAUTION
      The gas coming out is harmless, but be careful of chips which may fly up when drilling.

    4.  

  18.  

To install:

  1. Install or connect the following:

    Suspension support to the pneumatic cylinder (strut) and tighten the nuts to 27 ft. lbs. (36 Nm).
     
    Strut assembly to the vehicle and tighten the upper mounting nuts to 47 ft. lbs. (64 Nm).
     

  2.  
  3. Match the holes in the pneumatic cylinder with the holes in the suspension control actuator.
  4.  
  5. Install or connect the following:

    Actuator and tighten the mounting nuts to 69 inch lbs. (8 Nm).
     
    Actuator cover and tighten the 3 nuts to 18 ft. lbs. (25 Nm).
     
    New O-rings and connect the air line to the shock absorber. Tighten the fitting to 13 ft. lbs. (18 Nm).
     
    Strut to the rear axle carrier. Insert the bolt from the vehicle's rear and temporarily tighten the nut.
     
    Height control sensor link to the No. 1 lower control arm. Mounting nut: 48 inch lbs. (5 Nm).
     
    Rear brake caliper to the rear axle carrier and tighten the mounting bolts to 77 ft. lbs. (104 Nm).
     
    ABS speed sensor and wiring harness.
     
    Stabilizer bar link and tighten the nut to 48 ft. lbs. (65 Nm).
     
    The halfshaft
     
    Actuator electrical connector to the top of the strut.
     
    Tire
     

  6.  
  7. Move the height control switch to the ON position. Start the engine and fill the pneumatic cylinder with air.
  8.  
  9. Bounce the vehicle up and down several times to stabilize the suspension.
  10.  
  11. Turn the suspension height control to the OFF position.
  12.  
  13. Remove the tire and wheel assembly.
  14.  
  15. Support the rear axle carrier with a lifting device. Tighten the lower strut bolt to 101 ft. lbs. (137 Nm).
  16.  
  17. Install or connect the following:

    Package tray trim
     
    Rear seat cushion and seat back
     

  18.  
  19. Turn the suspension control switch to the ON position.
  20.  
  21. Check the wheel alignment.
  22.  

Without Air Suspension
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Rear seat cushion and seat back.
     
    Tray trim
     
    Tire and wheel assembly
     
    Rear halfshaft
     
    Stabilizer bar link from the stabilizer bar
     
    Anti-lock Brake System (ABS) speed sensor and wiring harness
     
    Brake caliper bracket from the axle carrier, leaving the brake line connected. Suspend the brake caliper aside with a piece of wire.
     
    Nut on the lower side of the strut. Do NOT remove the bolt.
     
    Rear axle assembly with a lifting device
     
    Strut cap by removing the 3 nuts
     
    3 mounting nuts holding the strut assembly to the strut tower. Do NOT remove the center bolt.
     

  4.  


CAUTION
Do NOT remove the center nut to the strut at this time.



Bolt on the lower side of the strut assembly
 
Strut assembly with the coil spring
 

  1. Compress the coil spring.
  2.  
  3. Secure the strut housing in a vise.
  4.  
  5. Remove or disconnect the following:

    Strut rod retaining nut
     
    Upper suspension support
     
    Upper insulator
     
    Coil spring
     
    Spring bumper
     
    Lower insulator
     

  6.  
  7. If discarding the strut, perform the following:
    1. Fully extend the strut rod.
    2.  
    3. Drill a hole in the strut (about 1 in. above the strut lower mount) and drain the gas inside
    4.  

  8.  


CAUTION
The gas coming out is harmless, but be careful of chips which may fly up while drilling.

To install:

  1. Install or connect the following:

    Lower insulator to the strut.
     
    Spring bumper to the strut piston rod
     
    Coil spring
     
    Upper insulator and support
     
    Upper suspension support
     

  2.  
  3. Temporarily install the upper strut rod retaining nut.
  4.  
  5. Rotate the suspension support so that the rod and one of the bolts on the suspension support are aligned with the lower bushing.
  6.  
  7. Remove the spring compressor.
  8.  
  9. Install or connect the following:

    Strut assembly to the vehicle and tighten the 3 nuts to 47 ft. lbs. (64 Nm). Tighten the strut rod retaining nut to 20 ft. lbs. (27 Nm).
     
    Strut assembly cap and install the 3 nuts
     
    Strut to the rear axle carrier. Install the bolt from the rear of the vehicle and temporarily tighten the nut.
     
    Brake caliper and tighten the mounting bolts to 77 ft. lbs. (104 Nm)
     
    ABS speed sensor and wiring harness
     
    Stabilizer link to the stabilizer bar and tighten the nut to 48 ft. lbs. (65 Nm)
     
    Rear halfshaft
     
    Tire and wheel assembly
     

  10.  
  11. Bounce the vehicle up and down to stabilize the suspension.
  12.  
  13. Support the rear axle assembly with a lifting device. Tighten the lower strut bolt to 101 ft. lbs. (137 Nm).
  14.  
  15. Install or connect the following:

    Rear seat cushion and rear seat back.
     
    Package tray trim
     

  16.  
  17. Check the wheel alignment.
  18.  

  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 nut to the strut at this time.



    Rear seat cushion and seat back.
     
    Tray trim
     
    Tire and wheel assembly
     
    Rear halfshaft
     
    Stabilizer bar link from the stabilizer bar
     
    Anti-lock Brake System (ABS) speed sensor and wiring harness
     
    Brake caliper bracket from the axle carrier, leaving the brake line connected. Suspend the brake caliper aside with a piece of wire.
     
    Nut on the lower side of the strut. Do not remove the bolt.
     
    Rear axle assembly with a lifting device
     
    Strut cap by removing the 3 nuts
     
    3 mounting nuts holding the strut assembly to the strut tower. Do not remove the center bolt.
     



    Bolt on the lower side of the strut assembly
     
    Strut assembly with the coil spring
     

  4.  
  5. Compress the coil spring.
  6.  
  7. Secure the strut housing in a vise.
  8.  
  9. Remove or disconnect the following:

    Strut rod retaining nut
     
    Upper suspension support
     
    Upper insulator
     
    Coil spring
     
    Spring bumper
     
    Lower insulator
     

  10.  
  11. If discarding the strut, perform the following:
    1. Fully extend the strut rod.
    2.  
    3. Drill a hole in the strut (about 1 in. above the strut lower mount) and drain the gas inside
      CAUTION
      The gas coming out is harmless, but be careful of chips which may fly up while drilling.

    4.  

  12.  

To install:

  1. Install or connect the following:

    Lower insulator to the strut.
     
    Spring bumper to the strut piston rod.
     
    Coil spring
     
    Upper insulator and support
     
    Upper suspension support
     

  2.  
  3. Temporarily install the upper strut rod retaining nut.
  4.  
  5. Rotate the suspension support so that the rod and one of the bolts on the suspension support are aligned with the lower bushing.
  6.  
  7. Remove the spring compressor.
  8.  
  9. Install or connect the following:

    Strut assembly to the vehicle and tighten the 3 nuts to 47 ft. lbs. (64 Nm). Tighten the strut rod retaining nut to 20 ft. lbs. (27 Nm).
     
    Strut assembly cap and install the 3 nuts.
     
    Strut to the rear axle carrier. Install the bolt from the rear of the vehicle and temporarily tighten the nut.
     
    Brake caliper and tighten the mounting bolts to 77 ft. lbs. (104 Nm)
     
    ABS speed sensor and wiring harness
     
    Stabilizer link to the stabilizer bar and tighten the nut to 48 ft. lbs. (65 Nm).
     
    Rear halfshaft
     
    Tire and wheel assembly
     

  10.  
  11. Bounce the vehicle up and down to stabilize the suspension.
  12.  
  13. Support the rear axle assembly with a lifting device. Tighten the lower strut bolt to 101 ft. lbs. (137 Nm).
  14.  
  15. Install or connect the following:

    Rear seat cushion and rear seat back.
     
    Package tray trim
     

  16.  
  17. Check the wheel alignment.
  18.  

 
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