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2nd Gen 3.8L 3800 Oil Pan Gasket R&I


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#1 98OldsIntrigue

98OldsIntrigue

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Posted 14 July 2017 - 01:07 AM

Ok, below is a REVISED VERSION ...

and so therefore (so far as I know)

  1. Suitably support the frame. Loosen the left side frame bolts.
  2. Remove the right side frame bolts. Lower the car/frame for access
  3. Loosely install all the engine mount nuts, and then tighten.
  4. Remove the Right (rear) exhaust manifold.

are worded as closely as possible as I can (presently) guess. And the numbering (above) obviously isn't right.

There is some debate about "4. Remove the Right (rear) exhaust manifold"

as that may have been left out of (some earlier/later) FSM's? I can't say with certainty if it's required tho I've a feeling it is.

But all-in-all, 2, 3, and 4 are suggestive of the fact that other/similar "How To" may have failed to (explicitly in writing) suggest that there may be a definite methodology to rocking/rolling the engine back off and/or into place involving either:

an engine fixture support

-OR-

B) a hoist, take yer pick.

 

The REST of the How To is (probably at least 98%) accurate as it stands. The whole thing would benefit from somebody who's done it before carefully reading and "advising of any mistakes" and/or B) Myself actually DOING it and                                        " ditto"

... Then the "HOW TO" could quickly/easily *achieve results* provided some images were added. 

NOTE: There is also a service bulletin about gasket sealant.

 

Oil Pan Replacement

Removal Procedure

 

   •  J 28467-90A Engine Support Adapters

   •  J 28467-B Universal Engine Support Fixture

Warning! The ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise … also disconnect the negative battery cable.

Caution!  Remove the oil level sensor, located in the oil pan, before the oil pan is removed. The sensor may be damaged if the oil pan is removed first.

  1. Disconnect the battery ground (negative) cable.
  2. Remove FI sight shield & throttle body air inlet duct. A rag covering the opening is perhaps a good idea.
  3. Remove the drive belt from the AC compressor.
  4. Remove the dog-bone (topside) engine mount struts from the engine.
  5. Remove the right front tire.
  6. Remove the right engine splash shield.
  7. Remove the torque converter cover.
  8. Drain the engine oil.
  9. Remove the oil filter.
  10. Disconnect the oil level sensor wiring harness connector. 
  11. Remove the oil level sensor.
  12. Remove the Right engine lift hook.
  13. Remove the exhaust crossover bolts at the Right (rear) exhaust manifold.
  14. Remove EGR tube & PNP switch from the manifold.
  15. Remove the three-way catalytic converter pipe from the right (rear) exhaust manifold. Refer to Catylitic Converter Replacement.
  16. Remove the Right (rear) exhaust manifold. Refer to Exhaust Manifold Replacement
  17. Lower the vehicle.
  18. Hoist engine/Install engine support fixture.
  19. Raise and suitably support the vehicle.
  20. Remove the AC compressor bolts. Place the compressor aside for access.
  21. Disconnect the power steering cooler brackets from the frame.
  22. Remove the front & rear engine mount bracket bolts from the engine.
  23. Remove the engine mount nuts.
  24. Suitably support the frame. Loosen the left side frame bolts.
  25. Remove the right side frame bolts. Discard the bolts. FINALLY, lower the car/frame for access
  26. Remove the engine mount and the engine mount bracket.
  27. Remove the oil pan retaining bolts.
  28. Lower the oil pan.
  29. Remove the oil pan.
  30. Remove the oil pan gasket.
  31. Clean the parts! The oil pan bolts, flanges, rail, front cover, rear main bearing cap, and threaded holes.
     
     

Installation Procedure

Caution!  Install the oil level sensor, located in the oil pan, after the oil pan is installed. The sensor may be damaged if the oil level sensor is installed first.

Caution!  Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Important  Do not over tighten bolts or damage to the oil pan may occur, resulting in an oil leak.

Tighten the oil pan bolts to 14 N·m (125 lb in).

Tighten the oil level sensor to 20 N·m (15 lb ft) 

  1. Install the oil pan gasket. 
  2. Install the oil pan.
  3. Apply one drop of thread lock compound GM P/N 12345382 or equivalent to the cleaned oil pan bolt threads.
  4. Install the oil pan bolts.
  5. Place the engine mount bracket in the proper position.
  6. Install new right side frame bolts. Make sure the frame is suitably supported. Install new left side frame bolts. Lower the vehicle.
  7. Lower the engine, using the engine support fixture.
  8. Remove the universal engine support fixture.
  9. Raise and suitably support the vehicle.
  10. Install the engine mount bracket bolts to the engine.
  11. Loosely install all the engine mount nuts, and then tighten.
  12. Install the AC compressor bolts.
  13. Connect the power steering cooler brackets to the frame. 
  14. Install the oil level sensor.
  15. Connect the oil level sensor wiring harness connector. 
  16. Install the new oil filter. Refer
  17. Install the oil pan drain plug.
  18. Install the torque converter cover.
  19. Install the right engine splash shield.
  20. Install the exhaust manifold.
  21. Install the PNP switch.
  22. Install EGR tube and bolt to 21 lb ft.
  23. Install exhaust crossover bolts.
  24. Install the right engine lift hook. Tighten to 30 N.m or 22 lb ft
  25. Install the three-way catalytic converter pipe to the exhaust manifold.
  26. Install the right front tire and wheel.
  27. Lower the vehicle.
  28. Install the dog-bone engine mount struts to the engine.
  29. Replace the FI sight shield & throttle body air inlet duct.
  30. Connect the battery ground (negative) cable.
  31. Fill the crankcase with new engine oil.
  32. Inspect for the proper fluid levels.
  33. Inspect for leaks.
  34. Measure the wheel alignment. Refer to Wheel Alignment Specifications in Wheel Alignment.





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