my car is overheating and i dont have aleak and coolant is full

Paul Roberson

Asked by Nov 15, 2014 at 02:34 AM about the Mercury Grand Marquis

Question type: Maintenance & Repair

the temp gauge is on cold then rise to normal range it also goes to the high end of the normal range. it wont cool off turning the heat on high temp,nor does it cool off because i try to cool it down this way turn off the heat and it goes to normal and heats back up

4 Answers

flush the system real good and change thermostat. thats the cheapest way to rule out a clog or thermostat sticking. bout 10 bucks.

3 out of 3 people think this is helpful.
Ricky Silvian

may be air trapped in the coolant system, had that problem. for me flushing and bleeding it worked. I left the coolant cap off topped it to the cold line, started the engine waited untill thermostat opened and drawn in the coolant and topped off as it took it in. threw the cap back on turned it off. and test drive it watch the needle closely for overheating or not at all. park let it cool top it off again, should do it.


Have the exhaust system checked for a restriction. This can be checked with a vacuum guage. I've had a similar problem with a catalyst converter being restricted on my vehicle.


I have a 2005 Mercury Grand Marquis smells like the catalytic converter is clogged and it also seem 2 Tremble When I mash the accelerator and then my gauge to act funny as well goin cold and hot I have a weird burn exhaust smell nd in reverse the exhaust treble nd da motor it not properly breathing so all honesty it's best to get da direct fit full system h pipe all v8 deserve one it increases horsepower and it anotherthing dnt neglect ya exhaust it cause thermostat nd radiator failure nd that y ya coolant drain tryna cool it down from da heat build up repair front cats and go h pipe straight pipe ne call Ford for ya upper steering shaft recall give ya vin num nd see if ya car need to get properly fix before it completely detach it self from in the steering wheel year 05 and yu basically the new box shape steering wheels

Your Answer

Add photo

Related Questions

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 2,589 nationwide Grand Marquis listings starting at $1,300.


Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 4,820
#2 kbro
Reputation 1,910
#3 Js08016
Reputation 1,420
View All

Related Models For Sale

Used Ford Crown Victoria"
10 Great Deals out of 1,636 listings starting at $1,950
Used Lincoln Town Car"
49 Great Deals out of 2,404 listings starting at $1,542
Used Chevrolet Impala"
997 Great Deals out of 35,743 listings starting at $700
Used Mercury Marauder"
52 listings starting at $6,987
Used Dodge Charger"
723 Great Deals out of 30,283 listings starting at $1,995
Used Ford F-150"
3,271 Great Deals out of 216,769 listings starting at $1,000
Used Honda Accord"
1,393 Great Deals out of 78,668 listings starting at $1,395
Used Chevrolet Tahoe"
1,141 Great Deals out of 36,609 listings starting at $1,695
Used Chrysler 300"
598 Great Deals out of 21,310 listings starting at $1,490
Used Ford Taurus"
363 Great Deals out of 23,136 listings starting at $1,400
Used Cadillac DeVille"
2,387 listings starting at $1,000
Used Ford Mustang"
770 Great Deals out of 41,446 listings starting at $900
Used Cadillac DTS"
91 Great Deals out of 1,913 listings starting at $1,995
Used Buick LeSabre"
21 Great Deals out of 2,603 listings starting at $1,450
Used Toyota Camry"
1,734 Great Deals out of 98,547 listings starting at $895