Heater Hose Outlet May Leak Coolant at Back of Intake Manifold on Mercury Grand Marquis
Problem overview
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.
71 people reported this problem
31 commentsMercury Grand Marquis vehicles with this problem
11 model years affected
Average mileage: 123,667 miles
(198 - 275,000)
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