[QUOTE]Originally posted by 240Joe
[B]My point is that compression testing has some serious shortcomings. First, it's very difficult to get reliable numbers.

It is not difficult to get reliable numbers. That's what the gauge is for, eh?

If a mechanic finds a low cylinder he will then do a cylinder leakage test to see where the air is going; i.e., leaking through a valve, past the piston rings, or a cracked head or bad head gasket.

It's called diagnosis. It finds a problem area.

Then we fix it. It's called engine repair.

Get it?