How much valve cover vacuum is normal?
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From: Yuma, AZ, USA
How much valve cover vacuum is normal?
I have read some on venting the valve cover and was wondering what is normal. I have a turbo with 9:1 pistons and when idling the valve cover has 10 - 15 psi vacuum. That seems like a lot. I also get white smoke out the exhaust but only when I turn. Is this related?
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From: Pearl City, HI, USA
Re: How much valve cover vacuum is normal? (Another B16)
15 PSI of vacuum would be greater than perfect vacuum. Are you sure it isn't 15 inches of water? Actually, I am sure it is. 15 inches of water is a perfectly normal level of vacuum.
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From: Yuma, AZ, USA
Re: How much valve cover vacuum is normal? (beepy)
Stupid question. Why is there so much vacuum in the valve cover and why is this desirable?
Modified by Another B16 at 4:53 AM 9/12/2004
Modified by Another B16 at 4:53 AM 9/12/2004
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