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Valve seal/3rd cyl low comp help/question

 
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Old 03-09-2012, 02:31 AM
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Valve seal/3rd cyl low comp help/question

Ok, we were changing cams to skunk2 pro1's (my car is in one dyno place who slaps it together)
everything installed fine UNTIL the builder started the engine.
there was some problems running and when they started to look
everything they saw that comp in 3rd cylinder was low (cylinders/pistons cleared to be fine)

so after checking they assumed that its valve seals that leaked... but what can cause this?

everything was changed in year ago when my head was ported, new seals etc car worked just fine until this (well there was little heat problem in last summer, but after that everything was still fine and comp test was ok then too)

or were there some installation error or something. I assume that they know how to do this, because theyre been around the motorsport game some time and so on (old rally people)

I started to think that was the outcome of something, not the cause, any opinions about this?
(and if you dont have any mechanical knowledge please dont say anything, need some real facts here)

anyway now the head is in machine shop, they check everything, new valve seals, head gasket and so on

thanks
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Old 03-09-2012, 08:26 PM
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Re: Valve seal/3rd cyl low comp help/question

Mass produced parts can always have some form of flaw. You may have just gotten the unfortunate luck of the draw on that one when the new seals were installed.
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