Car Problem Reports

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

 
Mercury Grand Marquis Problem
21 Reports
Me Too
Edit

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

Average Mileage: 126,385 mi (57,000 mi - 247,000 mi)

Verified

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.

  • Visitor, , 247,000 mi

    Has been leaking intermittntly. While removing heater hose to check hose, the outlet pipe pulled out of intake manifold. It will not thread tightly into intake manifold. Will clean this up and use JB Weld on it.

    Flag This
  • Visitor, , 212,000 mi

    made my spark plugs misfire..my car was skipping really bad

    Flag This
  • Visitor, , 119,000 mi

    Smelled antifreeze dripping from the back of the 4.6l down onto the exhaust pipe. I saw antifreeze squirting from a small pin hole in the heater hose outlet, which is pressed into the intake manifold. I cut a piece of rubber hose, put it over the pinhole and tightened a hose clamp over it . No more leak even under pressure.

    Flag This
  • Visitor, , 98,000 mi

    Heater hose leak at back on intake manifold. Used JB weld which held until new leak sprung at thermostat housing. Darn those plastic manifolds. No recall, but there should have been.

    Flag This
  •  Rookie

    I put in a "stopleak" compound and it is working fine. No leak. There was a recall on the plastic intake manifold. My car was too old to qualify. The redesigned manifold is now in aluminum I think (?)

    Flag This
  • Visitor, , 66,000 mi

    broken plastic connector to intake manifold

    Flag This
  • Visitor, , 85,000 mi

    intake manifold leak

    Flag This
  • Visitor, , 156,000 mi

    refilling engine coolent daily?

    Flag This
  • Visitor, , 102,000 mi

    Noticed a coolant leak first and later a misfire on cylinder 4. Found the leak at the outlet coming from intake manifold for the heater. Proceed to replace fouled coil and remove heater hose, while doing so outlet pops right out of the intake manifold. Fix still pending but looks to be jb weld is going to be involved due to the geniuses at Ford using plastic intake manifolds with metal outlets.

    Flag This
  • Visitor, , 150,000 mi

    Had leak from thermostat housing. Changed stat and o-ring. No fix. Replaced housing hood and thin layer of permaseal. Still no fix. Old housing inset bevel was more worn than original. Took it to mechanic. manifold gasket and stat hosing needed replaced. Cost about $600.

    Flag This
+ See more reports
Ask a Question