Thread: Motor Pics
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Old 02-21-2008, 08:39 PM   #18
Scooby Specialist
Member#: 62395
Join Date: May 2004
Chapter/Region: Tri-State
Location: NJ
2005 STI


Originally Posted by PPhilthy View Post
So why did this failure happen...?
The valves hit the pistons because wrong spec pistons. I don't think there were any valve reliefs cut in these pistons.

Originally Posted by flycaster View Post
Huh. So this is what actually happened to this motor, eh? I remember this from the Ron&Phil thread a while back...just supposedly tooling around town, decelerating from 4K, "tink", and it immediately shut down.

Did you ever determine if this was an assembly error, or an AVCS tuning error? Seems to me that it was likely one or the other...
I agree with that it could be either. But on the other hand this was my second motor this particular motor has had 3 separate failures the third one being catastrophic didn't make me feel like I wanted to mess with this builder anymore personally. Besides a car with oversized cams and oversized valvetrain should have pistons with valve reliefs right? I don't see any valve reliefs besides the ones the valves relieved them selves on.
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Last edited by greysave; 02-21-2008 at 08:48 PM.
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