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Mercury Grand Marquis Problems

Intake Manifold/Valve Cover Gaskets May Leak Oil on Mercury Grand Marquis

Problem Description and Possible Solution

It is not uncommon for the intake manifold and/or valve cover gaskets to develop a coolant or oil leak. Leakage from the intake manifold may result in coolant in the engine oil. Coolant mixing with the engine oil severally impacts the lubrication ability of the oil. Internal engine may result if this condition is not repaired promptly.

(5 people reported this problem)

Mercury Grand Marquis Vehicles With This Problem

RepairPal Fair Price Estimate
$317-$385
RepairPal Verified
Average mileage: 80,000 (80,000–80,000)
3 model years affected: 1990, 1991, 2000
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Brake problem? Or maybe a faulty head gasket cylinder?
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