Question about 1999 Mercury Cougar

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My 99 mercury cougar is overheating, i've replaced the radiator, thermosat, waterpump, & sending unit. Flushed it, and it still is not flowing right. I dont know what to do. i dont have alot of money to send it somewhere, so i'm stuck

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Does it have an electric fan, is the fan coming on, there should be a fan on the back of the radiator.

Posted on Apr 09, 2011

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What are possible causes for my 99 Quest to continually overheat?


There is a thermo switch, and there is a temperature control sensor.
Also replace the radiator cap. Check for good flow in the radiator, have it back flushed.

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99 mercury cougar v6 2.5L, temp gauge is reading hot after thermostat change why? is it a air bubble or is it a bad temp. sending unit? any other ideas? please help


May be a defective thermostat or place in the wrong direction. If it's properly installed, might want to check the fan operation which may be producing the overheating.
If fan is good, one way to remove air in the coolant system is to run vehicle while all heaters on. take extra coolant and stop along the way to top off if needed. While driving, keep listening for the fan to begin running when vehicle reaches high temperatures.
If you continue to experience overheating, may want to take to a local known repair shop for further troubleshooting.

Jun 17, 2017 | Cars & Trucks

2 Answers

I just change the coolant hose on my 2002 mercury cougar, 2.5 engine , but it boils over , is there a bleeder valve on this vehicle and where is it?


Problem can usually be traced to 1 of 3 things:
Stuck thermostat; with a thermostat stuck closed you would overheat and eventually get backflow into the reservoir
Bad waterpump; a bad bearing or a leaking water pump would cause your overheating problem
Bad head gasket; these are accompanied by white smoke from the exhaust and a foamy appearance on your auto transmission fluid dipstick

Jun 04, 2012 | 2002 Mercury Cougar

1 Answer

1999 ford ranger overheating. have replaced


Have you had the radiator tested for emission blow by?
Radiator Specialists can be of assistance with this testing device. Will indicate if the head gasket is leaking and cause overheating.

Jul 05, 2010 | 1999 Ford Ranger SuperCab

1 Answer

1999 mercury cougar,overheats ,I have install new waterpump,have radiator clean and remove thermostat,radiator fans do turn on.I'm lost.


Sounds like a blown head gasket .But thats easy bad relay switch or coolant temp switch or bad resistor.

Nov 24, 2009 | 1999 Mercury Cougar

2 Answers

1990 mercury cougar keeps overheating have replaced radiator and thermostat and problem is still happening. waterpump is not making a noise any suggestions Wayne


Get your radiator cap checked and if replacing use the one for a overflow tank. If the cap pressure was okay then you want to look at water circulation in the radiator. After the thermostat opens you should see flow inside the radiator. If it does not circulate the block is clogged or the water pump is bad.

Finally, if you have an electric cooling fan there are relays and some have two fan speeds. Autozone may be able to diagnose your problem.

Oct 31, 2009 | 1990 Mercury Cougar

1 Answer

Overheating


could be the waterpump

Jul 30, 2009 | 2002 Buick Rendezvous

1 Answer

89 dodge 100 truck overheating


sounds like your radiator is not flowing freely. this will cause it to overheat w/driving down road.

Nov 17, 2008 | 1989 Dodge Ram D-Series Pickups

1 Answer

Won't start?


Dear Customer,

In your case you have o check you radiator,& repair any puncture than try it,

problem occured cause of overheating as engine starts so, you must repair your radiator or you can replace this with new 1 radiator,

THNX

May 20, 2008 | 2000 Mercury Cougar

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