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Thread: Valve clatter?
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post #4 of (permalink) Old 02-08-2017, 07:42 PM
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Join Date: Mar 2011
Location: Lotus land,BC, Canada
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Originally Posted by sleekgt View Post
If it sounds like my late 88, it's the vacuum pump (do S4 Esprits have vacuum pumps?)

Yes and no, the S4 only uses a small electric vacuum pump for the hvac system flaps, it uses an electric booster pump for the brakes.
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