Montana, Silhouette, Venture 2000-2005

Oil Pan

Print

Removal & Installation



Use care when servicing the oil pan. The engine main bearing caps are drilled and tapped for structural oil pan side bolts. Do not overlook the side bolts when attempting to remove the oil pan.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:
    NOTE
    It is not necessary to disconnect any of the A/C lines from the compressor.



    Engine mount struts
     
    A/C compressor and set it aside
     

  6.  
  7. Install an engine support fixture.
  8.  
  9. Remove or disconnect the following:

    Catalytic converter pipe from the right side exhaust manifold
     
    Frame bolts and make certain that an engine stand (such as J 39580) is aligned below the engine, lower the frame
     
    Oil level sensor wiring harness connector
     
    Starter
     
    Transaxle brace from the oil pan
     
    Transaxle mount lower nuts
     
    Engine mount lower nuts and raise the engine with the support fixture
     
    Engine mount and bracket from the oil pan
     
    Oil pan and gasket
     

  10.  

To install:

Click image to see an enlarged view

Fig. Install the oil pan bolts



Click image to see an enlarged view

Fig. Use a torque wrench adapter to tighten the oil pan side bolts

  1. Clean the gasket mounting surfaces.
  2.  
  3. Apply a small amount of sealer GM 1234579 on both sides of the bearing cap.
  4.  
  5. Install or connect the following:

    Oil pan gasket
     
    Oil pan. Tighten the bottom bolts to 18 ft. lbs. (25 Nm) and the side bolts using tool J 39505 a torque wrench adapter to 37 ft. lbs. (50 Nm).
     
    Engine mount and bracket to the oil pan. Torque the bolt to 43 ft. lbs. (58 Nm).
     
    Lower the engine into position
     
    Transaxle lower nuts. Torque the nuts to 90 inch lbs. (10 Nm).
     
    Transaxle brace to the oil pan. Torque the bolts to 32 ft. lbs. (43 Nm).
     
    Starter. Torque the bolts to 35 ft. lbs. (47 Nm).
     
    Catalytic converter pipe to the right side exhaust manifold. Torque the bolts to 26 ft. lbs. (35 Nm).
     
    Frame and use new frame to body bolts. Torque the front bolts to 111 ft. lbs. (150 Nm) and the rear bolts to 122 ft. lbs. (165 Nm).
     

  6.  
  7. Remove the engine support fixture.
  8.  
  9. Install or connect the following:

    A/C compressor. Torque the bolts to 37 ft. lbs. (50 Nm).
     
    Engine mount struts. Torque the fasteners to 52 ft. lbs. (70 Nm).
     
    Negative battery cable
     

  10.  
  11. Fill the engine with oil.
  12.  
  13. Start the vehicle and inspect for leaks, repair if necessary.
  14.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Install the engine support fixture J-45057 to the engine to properly support the engine.
  4.  
  5. Raise and safely support the vehicle.
  6.  
  7. Remove the right front wheel.
  8.  
  9. Remove the right front splash shield.
  10.  
  11. Drain the engine oil.
  12.  
  13. Remove the lower ball joint nut and separate the lower control arm from the wheel knuckle. Refer to the following section for additional information, -Lower Control Arm, Removal & Installation.-
  14.  
  15. Remove the A/C compressor mounting bolts and position aside.
  16.  
  17. Remove the transaxle brace bolts and transaxle braces.
  18.  
  19. Remove the starter motor.
  20.  
  21. Disconnect the oil level sensor electrical connector.
  22.  
  23. Remove the front engine mount.

    Click image to see an enlarged view

    Fig. With the engine assembly supported, remove the front engine mount to access the oil pan-3.9L engine

  24.  
  25. Place a suitable floor jack under the frame.
  26.  
  27. Loosen (but do not remove) the left side frame bolts and remove the right side frame bolts.

    Click image to see an enlarged view

    Fig. Remove the right side frame bolts (1) and loosen the left side frame bolts and lower the frame to access the oil pan-3.9L engine

  28.  
  29. Lower the right side of the frame enough to remove the oil pan.
  30.  
  31. Remove the oil pan mounting bolts, oil pan and gasket.

    Click image to see an enlarged view

    Fig. Remove the oil pan side bolts (1) and oil pan bolts (2) to remove the oil pan-3.9L engine



    Click image to see an enlarged view

    Fig. Showing oil pan mounting bolt locations-3.5L engine

  32.  

To install:

  1. Clean the oil pan flanges, oil pan rail, front cover, rear main bearing cap and threaded holes of any old sealant material.
  2.  
  3. Apply sealant GM P/N 12378521, (Canadian P/N 88901148) or the equivalent, to both sides of the crankshaft rear main bearing cap. Press the sealant into the gaps using a putty knife.
  4.  
  5. Apply sealer GM P/N 12378521, (Canadian P/N 88901148) or the equivalent, to both sides of the front cover mating area.
  6.  
  7. Install the oil pan gasket.
  8.  
  9. Install the oil pan. Tighten the oil pan bolts to 18 ft. lbs. (25 Nm). Tighten the oil pan side bolts to 37 ft. lbs. (50 Nm).
  10.  
  11. Using a suitable jack, raise the right side of the frame and tighten the frame bolts as follows:
    1. Front frame bolts to 96 ft. lbs. (130 Nm).
    2.  
    3. Rear frame bolts to 177 ft. lbs. (240 Nm).
    4.  

  12.  
  13. Remove the jack and install the front engine mount. Tighten the nuts to 37 ft. lbs. (50 Nm).
  14.  
  15. Connect the oil level sensor electrical connector.
  16.  
  17. Install the starter motor.
  18.  
  19. Install the transaxle braces and tighten the bolts to 32 ft. lbs. (43 Nm).
  20.  
  21. Install the A/C compressor and tighten the mounting bolts to 37 ft. lbs. (50 Nm).
  22.  
  23. Connect the lower control arm to the steering knuckle, tighten the nuts to 40 ft. lbs. (55 Nm) and install a new cotter pin.
  24.  
  25. Install the right front splash shield.
  26.  
  27. Install the front wheel.
  28.  
  29. Remove the engine support fixture.
  30.  
  31. Refill the engine with oil to the correct level.
  32.  
  33. Start the engine and check for leaks.

    Click image to see an enlarged view

    Fig. Applying sealant to rear main bearing cap

  34.  

 
label.common.footer.alt.autozoneLogo