Compression nrs on 964T

[elz0808]

PPI results on 964T show engine compression range from 110 to 112, high miles good running engine, dont have leak down results yet.......need an opinion on these results, i think they are a bit low but very even, could this engine be ready for rebuild or could last another 10 to 15k miles ???

[Black_Hat]

leak down and oil pressure hot/cold - at idle & at RPM will tell
BUT
a head stud can break at any time if none are already broken

I just went through my C2 turbomotor great leakdown , compression , oil pressure , NO oil leaks
one broken head stud found at valve adjust time

[mreid]

That engine is 7:1 CR. Those numbers aren't bad as long as they are consistent across all cylinders. What year is it and are you seeing oil leaking around the base of the cylinders?

[elz0808]

Its a 91....car is out of town and havent seen it in person, have an independent shop doing the PPI, on Monday i should have leakdown results.....would oil leaking around the base of cyls be indication of head studs pulling/broken?

[elz0808]

What is the compression on just rebuilt engine? How low are the nrs on this car compared to a just rebuilt engine?

[Newsboy]

I feel leakdown numbers are more important. Will tell you how much leakage, and whether it is coming from exhaust, intake, or cylinders(pistons/rings). Let us know the results.

[elz0808]

Should have them tomorrow.....will post then......still curious to know what compression nrs should be....tks

[elz0808]

here are leak down results: 1-23%, 2-25%, 3-22%, 4-26%, 5-27%, 6-20%.....What do you guys think?