Car Problem Reports
Mercury Grand Marquis Heater Hose Outlet May Leak Coolant at Back of Intake Manifold
Mercury Grand Marquis Problem
Average Mileage: 126,385 mi (57,000 mi - 247,000 mi)
Visitor, 2000 Mercury Grand Marquis, 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.
Visitor, 1997 Mercury Grand Marquis, 212,000 mi
made my spark plugs misfire..my car was skipping really bad
Visitor, 1995 Mercury Grand Marquis, 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.
Visitor, 1999 Mercury Grand Marquis, 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.
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 (?)
Visitor, 2002 Mercury Grand Marquis, 66,000 mi
broken plastic connector to intake manifold
Visitor, 1998 Mercury Grand Marquis, 85,000 mi
intake manifold leak
Visitor, 1996 Mercury Grand Marquis, 156,000 mi
refilling engine coolent daily?
Visitor, 2000 Mercury Grand Marquis, 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.
Visitor, 1999 Mercury Grand Marquis, 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.