CHEVY OIL DRIPS FROM OIL FILL CAP

1972 Chevrolet Chevelle

Tiny

Rickss

August, 27, 2010 AT 3:39 PM

Engine Performance problem
1972 Chevy Chevelle V8 Two Wheel Drive Manual

Have oil that drips from the oil fill cap on a 1972, 454. Drops on the header, smokes and stinks and making a mess. Any ideas how to stop it?

Thanks for any help

6 Answers

Tiny

rasmataz

August, 27, 2010 AT 3:49 PM

Check the condition of the cap if okay-check and test the positive crankcase ventilation system-start at the PCV valve

Tiny

Rickss

August, 27, 2010 AT 4:03 PM

Oil cap is in good condition, will replace the PCV. On a 454 should there be 2 PCVs (one on each side) or one will work fine?

Thanks for the reply

Tiny

rasmataz

August, 27, 2010 AT 4:05 PM

There's only one PCV valve

Tiny

Rickss

August, 30, 2010 AT 8:39 PM

Replaced PVC and oil cap, after a 15 minute drive, problem back again, drips from the oil cap?

Any help?

Tiny

rasmataz

August, 30, 2010 AT 9:28 PM

Sounds like you need to rebuild the engine due to excessive blowby

Tiny

hmac300

December, 16, 2010 AT 4:10 PM

If you have a gauge small enough take teh oil filler cap off and see what the pressure is. If it's above 3psi then something is pressurizing the engine like no breather or blowby. There should be a hose leading to the air cleaner with a small filter to let the engine breathe as well as pcv.

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