Quote:
Originally Posted by aneal000
If this is the case how can a leak down test be used accurately if it forces the valves shut? .
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With an air leak test you are basically pressurizing the combustion chamber to perform a pressure test to see what is NOT sealing .
A bit like ressurizing your water pipe system at home to find/check for a leak .
We knew you had a leak , the compression test told us that .
What the air leak (leak-down) test tells you where it is leaking from .
The inlet and exhaust valves and the piston give you a "closed space "
Air will either leak by the piston (bottom end problem) or the head (top end problem) or the gasket (head gasket problem)
You've now found where its coming from ....
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