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wet vs. dry - I think it's important here (archive)

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Posted by john on December 27, 1999 at 13:05:54:

In Reply to: Re: Compression test question posted by delk on December 26, 1999 at 15:06:45:

: : : I only have a lousy Haynes manual for my 76 2002 (came with the car). It does not give info on running a compression test. I need to know which fuse will disable the ignition system or exactly what the procedure is to run the test. I do have the numbers needed (125 psi minimum).

: : : Merry Christmas and Thanks in advance!!

: : : Don C

: : First make sure your battery has a good charge. Remove the coil wire, and ALL the spark plugs. Block the throttle open. Then have someone turn it over (about 6 revs) while you read the gauge. Thats all there is to it!

: : Ken

: on a low one squirt some engine oil in and see if it raises the numbers' there many be a lot of oil in the motor already(blow by) and it might therefore read good when it is not

Though Kenny doesn't think I know anything and he thinks I'm a bad writer, I have to say I'm glad someone brought up the wet verses dry check. Doesn't that rule out rings verses other stuff? I got Dry readings (just like Ken said to do it BTW)142,88,127,146, WET (couple squirts of motor oil in the cylinder where the plug screws in)142,92,128,141. I'm concluding head gasket (Now here's where Ken and I will separate, if we haven't already ((Ken?)))and wait until something fails before doing anything about it. in other words, not a time bomb, just loss of performance.

I agree Haynes stinks - it's for people who already know what to do, IMHO.

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