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Old 12-14-2012, 09:18 PM   #52
Acejam2k
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Member#: 42645
Join Date: Sep 2003
Chapter/Region: NESIC
Location: MA
Vehicle:
2007 STI
Crystal Gray Metallic

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Quote:
Originally Posted by jamal View Post
You need to do a leakdown test. I've found that things have to be pretty bad (like a missing chunk of ringland) to see much of a drop in compression.
True - would a leaky valve seal show up on this? If a leak down test returns a bad value - how does one determine which part of the motor is to blame?

It's obvious to me something isn't right internally - rings or valve guides/seals - one way or another it needs to come out.
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