Audi A4 Quattro
Report: Oil Leaks From Camshaft Chain Tensioner and Valve Cover Gaskets
Audi A4 Quattro Problem
Model Year Affected: 1997
Visitor, 1997 Audi A4 Quattro, 157,000 mi
Valve cover & oil filler cap gaskets are rubber, and deteriorate badly after about 120k miles. Replace when leaking, or oil will drip onto exhaust manifolds and smoke. Also replace the inlet elbow to throttle body gasket (also rubber) as it hardens and wears, causing inlet vacuum leak. This may cause a false MAF sensor code.