GM Camaro/Firebird 1993-1998 Repair Guide

Rear Main Seal

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See Figures 1, 2, 3, 4 and 5

REMOVAL & INSTALLATION




CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

The rear main seal is a one piece unit. It can be removed or installed without removing the oil pan or crankshaft.

  1. Raise and safely support the vehicle with jackstands.
  2.  
  3. Remove the transmission.
  4.  
  5. If equipped with a manual transmission, remove the clutch and pressure plate.
  6.  
  7. Remove the flywheel assembly.
  8.  
  9. Using a suitable prytool, carefully pry the old seal out.
  10.  



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Fig. Fig. 1: When prying the rear main seal out, be careful not to damage the seal bore

  1. Inspect the crankshaft for nicks or burrs, correct as required.
  2.  



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Fig. Fig. 2: Crankshaft rear main seal - 5.7L engine

To install:
  1. Clean the area and coat the seal with engine oil. Install the seal onto tool J-34686 for 3.4L engines, J 41349 for 3.8L engines or J 35621 for 5.7L engines.
  2.  
  3. Install the tool (with the seal mounted to it) onto the rear of the crankshaft. Tighten the screws snugly to be sure the seal will be installed squarely over the crankshaft.
  4.  



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Fig. Fig. 3: Exploded view of the rear main seal installation - 3.4L engine

  1. Tighten the wing nut on the installation tool until it bottoms out.
  2.  
  3. Remove the tool from the crankshaft or rear oil seal housing, as applicable.
  4.  



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Fig. Fig. 4: Rear main seal and installation tool - 3.8L engine



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Fig. Fig. 5: After position the seal on the tool, install it to the crankshaft housing

  1. Install the flywheel.
  2.  
  3. If equipped with a manual transmission, install the clutch and pressure plate.
  4.  
  5. Install the transmission.
  6.  
  7. Check the fluid levels, start the engine and check for leaks.
  8.  

 
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