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L67 valve cover vacuum question

 
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kp_432
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2003 Chevrolet Impala
2004 Chevrolet Impala


PostPosted: Tue Sep 18, 2012 9:13 pm    Post subject:  L67 valve cover vacuum question Reply with quote

If there is a valve cover leak will this interfere with the vacuum? If my valve covers leak would that be enough for ruff idle like I have a vacuum hose out?

I accidently put a small crack when doing my LIM replacements, got a just a lil frusterated and forgot about the third bolt on the alt. try to yank off with a small crowbar, and put a small crack on the rear valve cover. -I know I know jacka** on my part- Applied that application that can fix lleaks on metal, been working for a little while. I can hear air being released from under the alt. thinking its the valve cover finally giving out. I have new covers coming in -thanks to dsmuts- and will be replacing both valve covers as the front one is warped and leaking.
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Dan
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PostPosted: Thu Sep 20, 2012 1:01 pm    Post subject:   Reply with quote

It'll seem like PCV failure open. On most GM motors, that doesn't feel like a huge deal but it's noticeable. Run the car with an open oil cap and if you don't see a difference, you've got a problem.

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