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Old 10-15-2007, 07:24 PM   #5
Scooby Specialist
Member#: 86078
Join Date: Apr 2005
Location: Central Pa.
2005 Sti
4094R Twin Scroll


Originally Posted by flycaster View Post
Ahh, no I didn't see that. Yeah, if you just had a valve job done, they shouldn't pass any air - something is definitely wrong.
That would depend on how the seats were cut...

I use carbide cutters on most of the hardened seats I do, and the valves will leak a little bit...

When the seats are done this way, they seal up after initial startup...
Not sure what percent they would leak though...

This explains what I mean... Click Here

If the valves were lapped into the seat, they will still leak a little bit as well...
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shvrdavid is offline   Reply With Quote