2002 Chevy Avalanche Oil in exhaust

EWINGERICR

MEMBER
2002 CHEVROLET AVALANCHE
V8
4WD
AUTOMATIC
75,000 MILES

Recently when starting my vehicle, it began spraying a small amount of oil out of the tail pipe. Once the engine starts there doesn't appear to be any additional oil loss as there is no smoke. There also does not appear to be any oil leaking from the engine area. This problem makes a mess on my garage wall and requires me to add oil to the truck. What could be causing this problem and how do I fix it.

1 Reply

2CARPRO JACK

MECHANIC
11,533 POSTS

Are you sure itis oil? It may be that the cndensation is building up in the tailpipe and when you start it the moisture is mixing with the soot in the exhaust and spraying it out. Oil doesnt make it that far in the exhaust, it is almost always burned through combustion. There should be a drain hole in the bottom rear edge of the muffler that is meant to drain out this moisture, do you have an aftermarket muffler or factory?If aftermarket, drill a small hole in the bottom rear of it to allow for this to drain. Newer cars burn very efficient and condensation is just part of the by-product of that