Civic Rear Main Oil Seal Leaks
Short DescriptionSYMPTOM
The engine leaks oil between the block and the transmission.
PROBABLE CAUSE
The rear main oil seal (crankshaft oil seal) is contaminated.
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Content
DIAGNOSIS
Clean the area with a shop towel where the engine block and transmission meet. Start the engine, and look for oil leakage from the area with the aid of a powdered leak detector.
• If you see any signs of leakage, go to REPAIR PROCEDURE.
• If you see no signs of leakage, then what looked like leakage may have been excess residue from a previous repair on another part. Continue with normal troubleshooting.
REPAIR PROCEDURE
1. Remove the transmission. Refer to section 13 or 14 of the appropriate service manual.
2. Remove and discard the rear main oil seal (crankshaft oil seal).
3. Install the new oil seal. Refer to page 7-29 of the ‘96–00 service manual or page 7-27 of the ‘01 service manual.
4. Reinstall the transmission.
5. Reinstall the drain plug with a new sealing washer.
6. Refill the transmission with the appropriate fluid.
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