Quote:
Originally Posted by Lumberg
The other thing is, how would one distinguish between a broken piston/ring and a blown head gasket with a compression test?
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A leakdown test would tell you if/where it's losing compression. If you hear lots of air escaping from the dipstick tube when testing the two cylinders that have oil in them, then there's problem with the rings or pistons...valve stem seals wouldn't account for the amount of oil you saw in the cylinders. Testing the front three wouldn't be expensive, but you'd have to remove the plenum to test the rears.
