CAR SOUNDS LIKE A DIESEL ESPECIALLY AT HIGHWAY SPEEDS. OIL IS AT FULL. EXHAUST PROBLEM MAYBE?
THAKSS
Dec 28, 2008 at 6:43 PM
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MHPAUTOS
CERTIFIED EXPERT
31,937 POSTS
Hi there,
Do you feel it is a mechanical knock or more like a exhaust leak, check around the exhaust manifold for dirty carbon stains, use a length of hose to listen around the gaskets, you may need to get a mechanic to listen as its near impossible to tell with out hearing it first hand.