Quote:
Originally Posted by mcneil
Lacking a real leakdown tester, I rigged up a 20 psi regulated source to the compression test fitting (See picture, sorry about the quality)
It's pressurizing the crankcase.. If I hold my hand over the crank breather, I can feel the pressure. If I hold it over the compressor inlet, nothing. Sounds like it's blowing into the crank, can't hear anything in the exhaust.
Hole in the piston? |
You could do that on any engine ever built and pressurise the crankcase.... piston rings make a lousy seal stationary, even on a brand new engine.
You do realise a head gasket blown across to an oil gallery will also pressurise a crank case....
This is why I am anti all these 99 different bull**** tests in a row.
remove the exhaust and intake manifolds, make up blanking plates, then pressurise the tract and that will tell you something, but who cares, you can't fix anything without taking the head off, so take the head off and let the dog see that rabbit.
Then, at least, you have a HOPE IN HELL of doing something none of these endless tests do, and detecting that you actually have two separate problems, fixing them both, and spending the next ten years driving your car without ever stripping the engine again.
Or you can just do a load more tests.... without really understanding what you are doing, and just pick the cheapest problem and go with that.... you never know, you may be lucky.