Question about 1999 Mercury Cougar
Could this be the water pump?
Are you putting the thermostat in correctly? It it will not work backwards.
And to confirm that there isn't a different problem, take the thermostat out all together and see if it overheats.
Engine not fully warming up is not usually caused by the thermostat. Stats usually fail closed, not open.
You will want to check the water temperature sending unit or gauge after verify the water temperature with an external calibrated thermometer. You can attach and insulate the external thermometer to the housing where thermostat is located.
Reply back what you figure out. I will be happy to help you further.
Posted on Feb 03, 2009
ok, its time for a radiator flush. there is major sludge in the internals of this radiator. Make sure the thermostat is in the correct position as well. I've seen many cars come into my shop with the thermostat inserted backwards.
Posted on Mar 13, 2009
hi jasso, I would recommend checking the water pump if you see no flow in the radiator. Make sure when you fill up the cooling system, that you fill it cold, and that the vent screw in the radiator is loose. fill system until fluid comes out the vent screw. tighten the screw, start the car and have someone run at 1500rpm and check for flow.also, make sure that you have your temp setting full hot and blower on middle speed so that you don't trap air in the heater core.
Posted on Apr 05, 2009
Are you sure the Fan is turning to cool the Engine? If it is not coming on to cool Engine Check the Rad. cooling fan relay.
Posted on Jan 04, 2010
Testimonial: "very helpful will try solution ASAP was the one thing I overlooked"
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