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Thread: egr valve leak

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    Default egr valve leak

    Happy new year!

    I had the EGR valve off yesterday as my car smokes after leaving it for 3 hours after a drive, but not when it is cold in the morning. I assume that the EGR valve should not leak any air into the intake manifold. The left hand valve (there are two) has a small air leak when i tested it.? It is only a small amount but none the less would the engine suffer due to a vacum leak? or something.....

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    Regular Member Gsi3.2's Avatar
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    short answer, yes it would make a difference as it's letting in un-metered air into the engine.. however i would have thought that it would leak when cold as a bit of thermal expansion when it's hot should close a minor gap.. Chuck a new gasket under it, after seeing if the mating surfaces are flat and not damaged, and see if it runs better..

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