1977 Ford F250

1977 FORD F-250
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SAMMY H
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1977 Ford F250 V8 alot miles
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Will a compretion test tell me if I have a blown head gasket? And do you know how much psi I should have roughly in a Big block 460 Ford?
Feb 25, 2008 at 5:54 PM
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BLACKOP555
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a compression test will tell you that and many other things, after a normall compression test you should do a wet test, put about 3 good squirts of oil in it, if that causes the pressure to go up dramatically then you have worn piston rings.

i dont know what compression you should have but the lowest should be no more then 75% less then the highest.
Feb 25, 2008 at 8:05 PM