Still Overheating

Asked by Aug 09, 2016 at 09:04 PM about the 2004 Mercury Grand Marquis

Question type: Maintenance & Repair

When we shut the motor off you could hear the fan roar like a bad bearing, haven't had AC for a couple of years...so we replaced the fan assembly, hoses, new water pump & 190 thermostat....still overheat at high temps i.e. 90-95+ degrees outside, in traffic, once you get going the fan kicks on & the gauge fluctuates then comes back down...changed thermostat to a 180...still doing it....jacked car up, removed reservoir cap & let engine run thinking there was a air void....still smelling coolant, don't see any leaks. Put regular coolant in (green), but read somewhere I needed to use orange??  What's left??  Confused

4 Answers

95

Hi Patricia, have you checked the heater core yet? Start the car idle it until normal operating temperature is reached then check the 2 hoses going in to it. If one is significantly cooler than the other then its probably the heater core.

1 out of 1 people think this is helpful.
95

May also be the water pump. After the engine is cool start the engine, remove the radiator cap and look inside to make sure coolant is flowing. If its not then its probably the pump.

1 out of 1 people think this is helpful.
58,505

You have replaced most of the coolant system,if Katie,s advice as to the heater core being bad or plugged show,s to be ok you might want to check the fan clutch,if not tuning right will cause this issue from heating up.

1,120

Have the radiator removed and cleaned, just to be on the safe side.Throw in a new water pump while you're at it. New hoses too. I always suspect the radiator, when there are problems. the radiator shop will tell you if it was plugged. fan clutch OK?

Your Answer

Add photo

Related Questions

  • Overheating 2 answers

    My car overheats when the a/c is on but when i turn off the a/c is cools back to normal temp

    2003 Mercury Grand Marquis GS

    -

    Maintenance & Repair

  • 2003 mercury grand marquis overheating, after replacing fan and thermostat 12 answers

    My 2003 mercury grand marquis is overheating, even after replacing the fan and thermostat. There does not appear to be any problem with the water pump. I can drive it all day at hiway speeds, but ...

    2003 Mercury Grand Marquis LSE

    -

    Maintenance & Repair

  • How to fix overheated cylinder on a grand marquis 1 answer

    2004 Mercury Grand Marquis

    -

    Maintenance & Repair

  • my car is overheating and i dont have aleak and coolant is full 4 answers

    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 ...

    Mercury Grand Marquis

    -

    Maintenance & Repair

  • 2002 Mercury Cougar v6 is overheating 1 answer

    My car is overheating and idk what's wrong. I can't find any coolant in the oil, and I have replaced the temperature coolant sensor, engine temp sensor, water pump, thermostat, and radiator. I do...

    2002 Mercury Cougar 2 Dr V6 Hatchback

    -

    Maintenance & Repair

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 2,248 nationwide Grand Marquis listings starting at $1,500.

ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 4,900
#2 kbro
kbro
Reputation 1,970
#3 Js08016
Js08016
Reputation 1,490
View All

Related Models For Sale

Used Ford Crown Victoria
7 Great Deals out of 1,487 listings starting at $2,900
Used Lincoln Town Car
45 Great Deals out of 2,131 listings starting at $1,999
Used Chevrolet Impala
967 Great Deals out of 36,458 listings starting at $1,800
Used Ford Mustang
714 Great Deals out of 38,571 listings starting at $1,963
Used Ford F-150
3,401 Great Deals out of 205,480 listings starting at $1,273
Used Chevrolet Tahoe
1,092 Great Deals out of 31,949 listings starting at $1,495
Used Buick LeSabre
11 Great Deals out of 2,352 listings starting at $1,768
Used Cadillac DeVille
1,965 listings starting at $1,600
Used Chrysler 300
501 Great Deals out of 21,026 listings starting at $1,500
Used Ford Taurus
359 Great Deals out of 22,407 listings starting at $1,499
Used Chevrolet Silverado 1500
2,678 Great Deals out of 149,055 listings starting at $1,800

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
5 Great Deals out of 44 listings starting at $7,617
2010 Mercury Grand Marquis For Sale
100 listings starting at $2,999
2009 Mercury Grand Marquis For Sale
7 Great Deals out of 117 listings starting at $3,495
2008 Mercury Grand Marquis For Sale
7 Great Deals out of 178 listings starting at $2,900
2007 Mercury Grand Marquis For Sale
9 Great Deals out of 167 listings starting at $1,500