Oil Leaks From Intake and Valve Covers on Buick Riviera

The intake manifold and valve cover gaskets can develop external engine oil leaks.

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Average mileage: 184,120 (138,000–230,240)
4 model years affected: 1990, 1991, 1992, 1993
6 people reported this problem
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problem details
1991 Buick Riviera 138,000 mi,
Leaking on the exhaust manifold.
1991 Buick Riviera 230,240 mi,
Oil leaks.