Infiniti Car 1998-05

Oil Pan 2

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Removal & Installation



3.5L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Engine undercover(s)
     
    Steel (lower) oil pan bolts in the reverse sequence of the torque sequence
     

  6.  
  7. Insert a seal cutter between the steel and aluminum oil pan.

    Click image to see an enlarged view

    Fig. Steel (lower) oil pan loosening and tightening sequence-I35

  8.  
  9. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Be careful not to damage the aluminum mating surface of the upper oil pan.

    Steel oil pan and the oil strainer
     
    Front exhaust pipe and its support
     

  10.  
  11. Hang the engine at the right and left side engine slingers with a suitable hoist.
  12.  
  13. Position a suitable jack under the transaxle.
  14.  
  15. Remove or disconnect the following:

    Crankshaft Position (CKP) sensors (REFERENCE and POSITION) from the oil pan
     
    Front and rear engine mounting nuts and bolts
     
    Center crossmember assembly
     
    Engine drive belts
     
    A/C compressor and bracket
     
    Rear cover plate
     
    Aluminum (upper) oil pan bolts in the reverse sequence of the torque sequence
     
    4 engine-to-transaxle bolts
     

  16.  
  17. Insert a seal cutter between the aluminum oil pan and the engine block.
  18.  
  19. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Be careful not to damage the mating surfaces of the oil pan or engine block.

    Oil pan assembly
     
    O-rings from the cylinder block and oil pump body
     

  20.  

To install:

  1. Install or connect the following:

    Baffle plate to the oil pan. Torque the bolts to 22-27 inch lbs. (2-3 Nm).
     

  2.  
  3. Apply sealant to the front and rear seal of the oil pan.

    New O-rings to the cylinder block and the oil pump body
     

  4.  
  5. Apply a 0.177-0.217 in. (4.5-5.5mm) continuous bead of liquid gasket to the upper oil pan mating surface and install the oil pan. Torque the bolts in sequence to 12-14 ft. lbs. (16-19 Nm).

    Click image to see an enlarged view

    Fig. Apply sealant to the front and rear seal of the oil pan as shown-I35



    Click image to see an enlarged view

    Fig. Aluminum oil pan torque sequence (loosen in reverse sequence)-I35



    Oil pan strainer. Torque the bolts to 12-14 ft. lbs. (16-19 Nm).
     
    Rear cover plate and the lower transaxle bolts
     
    A/C compressor and bracket
     
    Engine drive belts and adjust as necessary
     
    Center crossmember assembly
     
    Front and rear engine mounting nuts and bolts and remove the support jack and the engine hoist
     
    CKP sensors (REFERENCE and POSITION) to the oil pan. Torque the bolts to 75-96 inch lbs. (9-10 Nm).
     
    Front exhaust pipe and its support
     
    Oil strainer
     

  6.  
  7. Apply a 0.177-0.217 in. (4.5-5.5mm) continuous bead of liquid gasket to the lower oil pan mating surface and install the oil pan. Tighten the mounting bolts in sequence to 57-66 inch lbs. (6-8 Nm)
    NOTE
    Wait at least 30 minutes before refilling the engine oil.



    Engine undercover(s)
     
    Negative battery cable
     

  8.  
  9. Fill the engine with clean oil.
  10.  
  11. Start the engine, check for leaks and repair if necessary.
  12.  

2-Wheel Drive
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil and coolant.
  4.  
  5. Remove the hood.
  6.  
  7. Install a suitable engine slinger to secure the engine for crossmember removal.
  8.  
  9. Remove or disconnect the following:

    Front suspension crossmember
     
    Drive belts
     
    Alternator and starter
     
    Idler pulley and bracket
     
    Crankshaft Position (CKP) sensor
     
    Oil filter and oil cooler, as necessary
     
    Lower oil pan bolts in the reverse sequence of the torque sequence
     

  10.  
  11. Insert a seal cutter between the upper and lower oil pan. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Be careful not to damage the aluminum mating surface of the upper oil pan.

    Click image to see an enlarged view

    Fig. Lower and upper oil pan tightening sequence (use reverse for loosening)-G35 and M35



    Transmission joint bolts which pierce upper oil pan
     
    Rear cover plate
     
    Upper oil pan bolts in the reverse of the torque sequence
     

  12.  
  13. Insert a seal cutter between the steel and aluminum oil pan. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Be careful not to damage the mating surfaces.

    Oil strainer
     
    O-rings and discard
     

  14.  
  15. Clean all gasket mating surfaces.

    Click image to see an enlarged view

    Fig. Exploded view of the upper and lower oil pans and related components-G35 and M35 2WD

  16.  

To install:

  1. Install or connect the following:

    Oil strainer to the oil pump
     
    New O-rings to the cylinder block and oil pump side
     
    Oil pan gasket, applying RTV sealant as shown. Align the protrusion of the oil pan gasket with the notches of the front timing chain case and rear oil seal retainer.

    Click image to see an enlarged view

    Fig. Proper sealant application for upper oil pan gasket-G35 and M35

     

  2.  
  3. Apply sealant as shown in the illustration. Install the upper oil pan and tighten the bolts, in sequence, to 12-13 ft. lbs. (15.7-18.6 Nm).

    Click image to see an enlarged view

    Fig. Upper oil pan sealant application-G35 and M35



    Transmission joint bolts
     

  4.  
  5. For the lower oil pan, apply sealant as shown in the illustrations, then install and tighten the bolts, in sequence to 74-82 inch lbs. (8.3-9.3 Nm).

    Click image to see an enlarged view

    Fig. Lower oil pan sealant application-G35 and M35

  6.  
  7. The remainder of installation is the reverse of the removal procedure.
    NOTE
    Wait at least 30 minutes before refilling the engine oil.

  8.  
  9. Connect the negative battery cable
  10.  
  11. Fill the engine with clean oil and coolant.
  12.  
  13. Start the engine, check for leaks and repair if necessary.
  14.  

All Wheel Drive
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil and coolant.
  4.  
  5. Remove the hood.
  6.  
  7. Remove engine cover
  8.  
  9. Remove air hose and air duct to mass air flow sensor side and electronic throttle control actuator side
  10.  
  11. Remove front and rear undercover
  12.  
  13. Install a suitable engine sling to secure the engine for crossmember removal.
  14.  
  15. Remove or disconnect the following:
    NOTE
    Handle sensor with care; do not allow metal powder to adhere to magnetic tip or place sensor in a location where it might be exposed to magnetism



    Drive belts
     
    Front suspension crossmember
     
    Left and right halfshafts
     
    Side (intermediate) shaft
     
    Left and right engine mounting brackets and insulators
     
    Front driveshaft
     
    Alternator and starter
     
    Idler pulley and bracket
     
    Oil filter and oil cooler, as necessary
     
    Automatic transmission oil cooler
     
    Crankshaft Position (CKP) sensor
     



    Lower oil pan bolts in the reverse sequence of the torque sequence
     

  16.  
  17. Insert a seal cutter between the upper and lower oil pan. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Be careful not to damage the aluminum mating surface of the upper oil pan.
  18.  
  19. Remove oil strainer
  20.  
  21. Remove transmission joint bolts that pierce upper oil pan
  22.  
  23. Remove rear plate cover
  24.  
  25. Remove upper oil pan bolts in the reverse sequence of the torque sequence
  26.  
  27. Remove O-rings from bottom of cylinder block and oil pump and discard
  28.  
  29. Remove oil pan gaskets and clean all mating surfaces
  30.  
  31. Remove axle pipe from upper oil pan (if necessary) and discard O-rings.

    Click image to see an enlarged view

    Fig. Exploded view of the upper and lower oil pans and related components-G35 and M35 AWD

  32.  

To install:

  1. Install axle pipe to upper oil pan, if removed, from axle pipe flange side (left)
    NOTE
    Lubricate O-rings with engine oil and insert pipe with care to prevent O-ring from sliding



    Click image to see an enlarged view

    Fig. Details of axle pipe installation-G35 and M35 AWD

  2.  
  3. Install or connect the following:

    Oil strainer to the oil pump
     
    New O-rings to the cylinder block and oil pump side

    Click image to see an enlarged view

    Fig. Sealer application to the upper pan gasket-G35 and M35 AWD



    Click image to see an enlarged view

    Fig. Sealer application to the upper pan-G35 and M35 AWD



    Click image to see an enlarged view

    Fig. Upper pan torque sequence-G35 and M35 AWD



    Click image to see an enlarged view

    Fig. Lower pan torque sequence-G35 and M35 AWD

     
    Oil pan gasket, applying RTV sealant as shown. Align the protrusion of the oil pan gasket with the notches of the front timing chain case and rear oil seal retainer.
     

  4.  
  5. Apply sealant as shown in the illustration. Install the upper oil pan and tighten the bolts, in sequence, to 12-13 ft. lbs. (15.7-18.6 Nm).
    NOTE
    M8 bolts number 5, 7, 8 and 11 are 3.97 inches (100mm) ; remaining bolts are 0.98 inches (25mm)



    Transmission joint bolts
     

  6.  
  7. For the lower oil pan, apply sealant as shown in the illustrations, then install and tighten the bolts, in sequence to 74-82 inch lbs. (8.3-9.3 Nm).
  8.  
  9. The remainder of installation is the reverse of the removal procedure.
    NOTE
    Wait at least 30 minutes before refilling the engine oil.

  10.  
  11. Connect the negative battery cable
  12.  
  13. Fill the engine with clean oil and coolant.
  14.  
  15. Start the engine, check for leaks and repair if necessary.
  16.  

4.1L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Attach an engine support fixture to the engine so the right and left engine mounts can be removed.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Drive belts
     
    Cooling fan and coupling
     
    Power steering oil pump
     
    Front stabilizer bar brackets from the side members
     
    Right and left engine mounting bolts
     
    Steering shaft lower joint
     
    Power steering tube bracket and support the front suspension member
     
    Lower the front suspension member
     
    A/C compressor and bracket
     
    Oil pan mounting bolts, then insert a tool into the notch on the oil pan and break the seal between the pan and engine block. Be careful not to damage the sealing surface.
     
    Pull the oil pan out from the front while lowering the suspension as needed
     

  8.  

To install:

  1. Clean all gasket mating surfaces thoroughly.
  2.  
  3. Apply a continuous bead of liquid gasket to the oil pan mating surface. Be sure the bead is18
  4.  
  5. Install the oil pan and tighten the retainers as follows:
    1. Bolts 1 through 21 in sequence: 12-14 ft. lbs. (16-19 Nm).
    2.  
    3. Bolts 22 and 23: 56-65 in lbs. (6-7 Nm).
    4.  

  6.  


NOTE
Wait at least 30 minutes for the sealant to cure before filling the engine with oil.



Click image to see an enlarged view

Fig. Tighten the oil pan bolts in the sequence shown-4.1L engine

  1. Install or connect the following:

    A/C compressor and bracket
     
    Front suspension member. Torque the nuts to 87-101 ft. lbs. (147-167 Nm).
     
    Power steering tube on the suspension member
     
    Lower steering shaft joint
     
    Stabilizer bar to the suspension member. Torque the nuts to 35-46 ft. lbs. (47-62 Nm).
     
    Engine mounting bolts. Torque the nuts to 41-49 ft. lbs. (55-67 Nm).
     
    Cooling fan and coupling
     
    Drive belts and adjust as required
     
    Negative battery cable
     

  2.  
  3. Fill the engine with clean oil.
  4.  
  5. Start the vehicle, check for leaks and repair if necessary.
  6.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Attach an engine support fixture to the engine so the right and left engine mounts can be removed.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Drive belts
     
    Cooling fan and coupling
     
    Power steering oil pump
     
    Front stabilizer bar brackets from the side members
     
    Right and left engine mounting bolts
     
    Steering shaft lower joint
     
    Power steering tube bracket and support the front suspension member
     
    Lower the front suspension member
     
    A/C compressor and bracket

    Click image to see an enlarged view

    Fig. Use a suitable tool to break the seal between the oil pan and engine block-4.1L engine

     
    Oil pan mounting bolts, then insert a tool into the notch on the oil pan and break the seal between the pan and engine block. Be careful not to damage the sealing surface
     
    Pull the oil pan out from the front while lowering the suspension as needed
     

  8.  

To install:

  1. Clean all gasket mating surfaces thoroughly.
  2.  
  3. Apply a continuous bead of liquid gasket to the oil pan mating surface. Be sure the bead is 1 / 8 inch (3mm) wide.
  4.  
  5. Install the oil pan and tighten the retainers as follows:
    1. Bolts 1 through 21 in sequence: 12-14 ft. lbs. (16-19 Nm).
    2.  
    3. Bolts 22 and 23: 56-65 in lbs. (6-7 Nm).
      NOTE
      Wait at least 30 minutes for the sealant to cure before filling the engine with oil.



      Click image to see an enlarged view

      Fig. Tighten the oil pan bolts in the sequence shown-4.1L engine

    4.  

  6.  
  7. Install or connect the following:

    A/C compressor and bracket
     
    Front suspension member. Torque the nuts to 87-101 ft. lbs. (147-167 Nm)
     
    Power steering tube on the suspension member
     
    Lower steering shaft joint
     
    Stabilizer bar to the suspension member. Torque the nuts to 35-46 ft. lbs. (47-62 Nm)
     
    Engine mounting bolts. Torque the nuts to 41-49 ft. lbs. (55-67 Nm)
     
    Cooling fan and coupling
     
    Drive belts and adjust as required
     
    Negative battery cable
     

  8.  
  9. Fill the engine with clean oil.
  10.  
  11. Start the vehicle, check for leaks and repair if necessary.
  12.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Attach an engine support fixture to the engine so the right and left engine mounts can be removed.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Drive belts
     
    Cooling fan and coupling
     
    Power steering oil pump
     
    Front stabilizer bar brackets from the side members
     
    Right and left engine mounting bolts
     
    Steering shaft lower joint
     
    Power steering tube bracket and support the front suspension member
     
    Lower the front suspension member
     
    A/C compressor and bracket

    Click image to see an enlarged view

    Fig. Use a suitable tool to break the seal between the oil pan and engine block-4.1L engine

     
    Oil pan mounting bolts, then insert a tool into the notch on the oil pan and break the seal between the pan and engine block. Be careful not to damage the sealing surface
     
    Pull the oil pan out from the front while lowering the suspension as needed
     

  8.  

To install:

  1. Clean all gasket mating surfaces thoroughly.
  2.  
  3. Apply a continuous bead of liquid gasket to the oil pan mating surface. Be sure the bead is 1 / 8 inch (3mm) wide.
  4.  
  5. Install the oil pan and tighten the retainers as follows:
    1. Bolts 1 through 21 in sequence: 12-14 ft. lbs. (16-19 Nm).
    2.  
    3. Bolts 22 and 23: 56-65 in lbs. (6-7 Nm).
      NOTE
      Wait at least 30 minutes for the sealant to cure before filling the engine with oil.



      Click image to see an enlarged view

      Fig. Tighten the oil pan bolts in the sequence shown-4.1L engine

    4.  

  6.  
  7. Install or connect the following:

    A/C compressor and bracket
     
    Front suspension member. Torque the nuts to 87-101 ft. lbs. (147-167 Nm)
     
    Power steering tube on the suspension member
     
    Lower steering shaft joint
     
    Stabilizer bar to the suspension member. Torque the nuts to 35-46 ft. lbs. (47-62 Nm)
     
    Engine mounting bolts. Torque the nuts to 41-49 ft. lbs. (55-67 Nm)
     
    Cooling fan and coupling
     
    Drive belts and adjust as required
     
    Negative battery cable
     

  8.  
  9. Fill the engine with clean oil.
  10.  
  11. Start the vehicle, check for leaks and repair if necessary.
  12.  

4.5L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Front wheels
     
    Hood
     
    Engine appearance cover
     
    Engine splash shield
     
    Drive belts
     
    Power steering pump belt tensioner
     
    Power steering oil pump and wire aside
     
    Oil filter
     
    A/C compressor and wire aside
     
    Wiring harnesses at oil pan
     
    Crankshaft Position Sensor (CKP)
     

  6.  
  7. Attach an engine lifting device and hold engine in place.
  8.  
  9. Remove the front lower crossmember.
  10.  
  11. Remove the oil pan rear plate cover.
  12.  
  13. Remove 4 transmission-to-oil pan bolts.
  14.  
  15. Remove oil pan bolts in reverse order of the tightening sequence.
  16.  
  17. Remove the oil pan and oil strainer.
  18.  


    Click image to see an enlarged view

    Fig. Exploded view of oil pan assembly-4.5L engine



    Click image to see an enlarged view

    Fig. Oil pan bolt tightening sequence-4.5L engine


To install:

  1. Clean all gasket mating surfaces thoroughly.
  2.  
  3. Apply a continuous bead of liquid gasket to the oil pan mating surface. Be sure the bead is18
  4.  
  5. Install the oil pan and oil strainer. Tighten the bolts in sequence to 15-17 ft. lbs. (20-23 Nm).
  6.  
  7. Reverse the removal procedure to complete the installation. Tighten the front crossmember bolts to 80-93 ft. lbs. (108-123 Nm).
  8.  
  9. Fill the engine with clean oil.
  10.  
  11. Start the vehicle and check for leaks.
  12.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Front wheels
     
    Hood
     
    Engine appearance cover
     
    Engine splash shield
     
    Drive belts
     
    Power steering pump belt tensioner
     
    Power steering oil pump and wire aside
     
    Oil filter
     
    A/C compressor and wire aside
     
    Wiring harnesses at oil pan
     
    Crankshaft Position Sensor (CKP)
     

  6.  
  7. Attach an engine lifting device and hold engine in place.
  8.  
  9. Remove the front lower crossmember.
  10.  
  11. Remove the oil pan rear plate cover.
  12.  
  13. Remove 4 transmission-to-oil pan bolts.
  14.  
  15. Remove oil pan bolts in reverse order of the tightening sequence.
  16.  
  17. Remove the oil pan and oil strainer.

    Click image to see an enlarged view

    Fig. Exploded view of oil pan assembly-4.5L engine



    Click image to see an enlarged view

    Fig. Oil pan bolt tightening sequence-4.5L engine

  18.  

To install:

  1. Clean all gasket mating surfaces thoroughly.
  2.  
  3. Apply a continuous bead of liquid gasket to the oil pan mating surface. Be sure the bead is 1 / 8 inch (3mm) wide.
  4.  
  5. Install the oil pan and oil strainer. Tighten the bolts in sequence to 15-17 ft. lbs. (20-23 Nm).
  6.  
  7. Reverse the removal procedure to complete the installation. Tighten the front crossmember bolts to 80-93 ft. lbs. (108-123 Nm).
  8.  
  9. Fill the engine with clean oil.
  10.  
  11. Start the vehicle and check for leaks.
  12.  

 
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