comp/leakdown questions
 

Any reason to be concerned about the following leakdown results?

5%, 5%, 4%, 12%, 10%, 5%

Comp. on the two highest counts was 135psi.

Motor is a 1993 3.6 with 49k

I didn't think they sounded too bad considering the mileage. Base gaskets are starting to show signs of weepage on the two higher numbers.

Matt

I'd sure be trying to find out what the situation is on the two leakdowns of 12% and 10%.

+1

Not familiar with the 3.2 but 49K is not a lot of mileage and the variation from 5-12% should raise a red flag, IMO. The "high" cylinders are 135 psi compression--what are the others?

Others were ~150-155 psi I believe. The results are bing faxed up later.

Short of a teardown how can one assess the causes for the lower numbers? My best guess would be ring wear due to the seemingly tight base gaskets. The agreed price between the seller and I reflects a top end rebuild within the next year, but I am not as familiar as most of you with these causes.

Thanks for the help!

Matt

Could be something as simple as loose head studs, especially since there is weeping at the gaskets. Try retorquing the nuts and see if that improves things, as a first step.

When one does a leakdown, they should be seeing where the leakage is occuring, that is one of the main reasons to do the test.....

Cheers

you should always recheck any high leakdown numbers by running the engine again in hopes of blowing out any carbon bits that fell from removing the plugs that may be trapped between valve and seat. i never get too excited about high numbers until after one or two rechecks. was the engine hot or cold when that was done? needs to be hot.