Question about 1997 Mercury Grand Marquis

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What do I do if my grand marquis is running hot but I don't see a hole or anything in a hose,but its spraying water and antifreeze

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What you need to do is a pressure test on the cooling system, fix leaks before going deeper. Spraying water/antifreeze would mean that the system cannot hold pressure, which is requried to keep it from boiling...

Posted on Nov 14, 2010

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My 99 Merc. Grand Marquis has an L-shaped hose coming from the dash area (heater core?) to the rear part of the engine. It has started to pop off everytime I drive it, and it sprays antifreeze all over...


Yeah.....you gotta clamp that hose on wherever it goes with a hose clamp. there's probably 15 lbs. of pressure per sq. in. pushing it back off the pipe.Go 60?40 on your anti-freeze and you should be fine. don-ohio

Oct 12, 2011 | 1999 Mercury Grand Marquis

1 Answer

Loosing antifreeze.. I have a 2005 Dodge Grand Caravan and it is losing antifreeze yet there is not puddles on the ground where I park..


my van was loosing coolant ,the problem was it had a small hole on the upper rad hose the only way I found the hole was when the engine was hot I moved the hose a little bit and the leak showed up.

Mar 01, 2011 | 2005 Dodge Grand Caravan

1 Answer

1999 mercury grand marquis occasionally overheats, leaks around radiator cap, makes gurgling noise on passenger side. Have replaced heater core, water pump, thermostat, hoses,& radiator cap.


Check the antifreeze for oil, pull your dipstick out, see if antifreeze is in oil or smells sweet or over full, sounds like you may of a bad head gasket. You can also check this by having a compression test done on the cylinders.

Feb 18, 2011 | 1999 Mercury Grand Marquis

2 Answers

1999 mercury grand marquis occcasionally overheats, blows antifreeze out around radiatior cap & has a gurgling sound coming from passenger floor/dash area. Have replaced thermostat, hoses, waterpump,...


The Grand Marquis's have a know problem that causing overheating. The intake manifold cracks around the water inlet tubes on the intake manifold causing it to loose anti-freeze which in turn causes overheating. Mercury has a beefed up replacement intake manifold that cures the problem. It was a subject of an unannounced recall but they would replace it unless the problem occurs. The recall was for 7 years which the 1999 model wouldn't qualify for now. It happened to me and cost about $450.00 (parts and labor) to fix it. I used a local repair shop to do the work. If, after the engine is hot, you hear water/steam coming from the top of the manifold, you have the problem

Feb 18, 2011 | 1999 Mercury Grand Marquis

1 Answer

My 2004 grand prix has a hole in the heater core. unfortually becuase of my financial situation i am not able to fix so i bypassed the heater core. but now my car is running hot. it never did before....


1) Are you sure that you got all the air out of the cooling system after your heater core bypass surgery?
2) Did you bypass the heater core by plugging the two hoses to each other, or did you cap the ends of the hoses? If you capped them, try using a pipe nipple to plug them together so water can move through the hoses.

Jan 23, 2011 | 2004 Pontiac Grand Prix

1 Answer

Water will not flow through the radiator


take off upper hose -run car drain fluid-when draining stops add water hose to radiator top- run clear water out for 5 minutes-temporarily re-attach hose run for 3 minutes-open hose and let drain again for a few minutes with water hose inserted-take out hose and drain-do not let engine get hot-spray off front of radiator-reaatach hoser and top off at least 1 gallon antifreeze.

Sep 16, 2010 | 1997 Cadillac DeVille

2 Answers

Leaking antifreeze, doesn't run hot, took off hoses thought it was the top hose and can't see anything wrong with it. Can't see any cracks in radiatior any ideas?


You state you checked the top hose, did you check the bottom hose as well? Also, there is the possibility it could be leaking at the water pump.

Jul 03, 2010 | 1999 Pontiac Grand Prix

1 Answer

2005 Jeep Grand Cherokee has antifreeze leaking


fill it up and wait for it to leak again. Its about the only way your going to find it for sure. Rev it up and let it get hot in the driveway.

Apr 13, 2010 | 2000 Jeep Grand Cherokee

1 Answer

2005 MGM - Need to change coolant


There is only one drain point. Drain the coolant from the system at the radiator. This will remove coolant from the engine. Be sure and have the heater set to hot. Flush the system with a water hose. Fill the system with a 50/50 mix of antifreeze and distilled water. Do not use tap water. Start the engine with the radiator cap off and keep adding coolant until it will take no more and you see no more air bubbles escaping from the radiator. If there are schrader bleed valves on the engine cooling system use them to remove any more trapped air. Put the cap on and start the engine and let it run for 15 minutes while you check for leaks. I would replace the thermostat at this time as it is just good preventive maintenance.

Oct 02, 2009 | 2005 Mercury Grand Marquis

1 Answer

Intake heater hose leak


u sure do. not to hard to do be sure to replace gaskets and knowing if u have a dorman intake or stok helps gaskets are different most part stores will have to order the dorman gaskets. and DO NOT OVERTHIGHTEN !!!!!

Jan 08, 2009 | 1996 Mercury Grand Marquis

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