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Join Date: Feb 2009
Location: Boulder Creek CA
Posts: 2,979
Originally Posted by Jeff Alton View Post
Interesting product, have thought about it for a few years since it was released. I have to ask, if you think you need one, why? Is your crankcase filling up with oil? If so, what is different about your engine vs 99.9% of the other engines that are not filling up with oil? Will you be treating a symptom or providing a cure?

Although never coming across and engine/use situation that would require this part, it does beg the above questions.

Not saying it is a bad or un needed product by any means. Just wondering what circumstances are present in an engine that requires one.

The problem lies with not driving. Every 911 without the valve will eventually leak back into the sump. It is the reality of the design, to have enough "head" for the oil pump, to insure consistent oil pressure. The oil pump has internal clearances that will allow the oil to gravity feed back to the lowest point available(sump or floor).
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Old 10-02-2019, 09:32 AM
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