View Single Post
Old 10-02-2011, 10:39 PM   #2
Fred T
Cantankerous Geezer
 
Fred T's Avatar
 
Join Date: Aug 2002
Location: Bel Aire, KS
Posts: 6,264
Re: #1 #2 #3 low compression in L6 250

Best way to tell is to set the cylinder with both valves closed and connect compressed air to the spark plug hole. The listen for the air out the exhaust or crankcase.

Another method is to repeat the test with a small squirt of gear oil in the cylinder. That will usually seal the rings enough to raise the pressure if rings are the problem.
__________________
Fred

There is no such thing as too much cam...just not enough engine.
Fred T is offline   Reply With Quote