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2000 mercury cougar just changed water pump and thermostat and it is still over heating what else can be the problem

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The radiator should be checked out. Also do a compression check to see if there might be a head gasket leak.

Posted on Mar 19, 2011


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Picture of a 2001 Mercury cougar water pump and belt

Go online to and enter your vehicle info. Then select vehicle repair guides. You will be able to view the entire water pump R&R procedure, including pictures and diagrams of your pump and belt routing info.

Jun 27, 2014 | 2000 Mercury Cougar

1 Answer


Bad water pump, low on water..thermostat bad, cooling fan or fan relay switch broke,clogged radiator ..Catalytic converter clogged .....These are the first things to check...

Aug 10, 2013 | 1997 Mercury Cougar XR7

1 Answer


Two things.........either it's a bad blender motor,or more likely,plugged heater core..Remove heater hose from near thermostat and heater hose from water pump,and flush from water pump side heater hose back thru the heater core and out the thermostat side heater hose with a pistol grip type water nozzle. don-ohio

Nov 05, 2011 | 1999 Mercury Cougar

1 Answer

My 1999 cougar is over heating i have changed the thermostat and the radiator already and the water pump is good but the car is still over heating should i get a coolant flush to see if that clears it up...

Why would you even think about a coolant flush?

You have a new radiator, so all that is left is the heater core
That isn't your problem

You lost all the coolant when you did the radiator & thermostat
So what is there to flush ?

No bottle of doctor do good will fix your issues

Diagnose the main cause

How do you know the water pump is good?
Was it in your hand and still had an impeller that wasn't eaten away?
Was it pumping coolant and the system built up pressure that you
actually tested

Have you tested for combustion gases in case the head gasket is gone?

Sep 22, 2011 | 1999 Mercury Cougar

1 Answer

The car is overheating.. no apparant hose leaks..

One or several things are common causes for over heating
here are the ones that are basic cooling system issues.
1-low coolant level
2-thermostat needs replaced
3-water pump needs replaced
4-belt worn
5-belt tensioner weak
6-fan problems
a-bad fan
b-bad temp sensor
c- wiring/connector problem

Oct 31, 2010 | 2000 Mercury Cougar

1 Answer

I have a 1995 couger w/v8,it is over heating,i changed the thermsat,could it be the water pump or water outlet?or ???

Assuming your coolant is right full, and you've changed the thermostat, it could be the water pump (these usually start to leak or make noise if they go bad), but I would check the condition of your radiator first. If it hasn't been replaced or flushed out in 15 years it could be plugged, restricting coolant flow and causing your car to overheat.

Apr 15, 2010 | 1995 Mercury Cougar

2 Answers

I have a 2000 cougar that is over heating after when ac is on. After installing a new air conditioner compressor

REmove radiator and have it clean, change thermostat and use good grade coolant.

Jul 10, 2009 | 2000 Mercury Cougar

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