Car Problem Reports

Mercury Grand Marquis Heater Hose Outlet May Leak Coolant at Back of Intake Manifold

Mercury Grand Marquis Problem
18 Reports
Me Too

Model Years Affected: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002

Average Mileage: 129,253 mi (57,000 mi - 247,000 mi)


The heater hose outlet may leak coolant at the back of the intake manifold. Sometimes this is misdiagnosed as a leaking intake manifold gasket because it resembles a leaking manifold.

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