oil out of back of engine onto hot pipes why from where


Asked by Jul 23, 2007 at 11:00 PM about the 1990 Chevrolet Corvette

Question type: Maintenance & Repair

1990 corvette oil on trsns behind top of motor running down on to hot pipes ,from where ,why also clunk when given gas, trans or u joint ?

2 Answers


Sounds like either a rear main seal, external head gasket leak, or valve cover gaskets causing the oil on your exhaust pipes. The thunk on acceleration is probably U-joints since the Corvette is rear-wheel drive. Have the U-joints checked for play before suspecting the transmission.

John Carson

If the oil is coming down the back of the engine, it is the valve covers leaking. The clunk could be in the drive shaft u-joints or the half shaft u-joints. Not a bad idea to replace all of them at one time if you do. Also check the distributor for the source of the oil leak.

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