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Amedee, Mercury Technician
Category: Mercury
Satisfied Customers: 23950
Experience:  ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
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Mercury Villager 1999 mercury villager sport. overheating

Customer Question

1999 mercury villager sport. overheating replaced water pump, thermostat and tempature switch and still overheating. what should i do?
Submitted: 5 years ago.
Category: Mercury
Expert:  Amedee replied 5 years ago.



Did you still need help?


What kind of diagnostic equipment do you have?

Customer: replied 5 years ago.
i do not have any diagnostics equipment. when it overheated while my wife was driving it i figured it to be a good oppurtunity to replace those parts because of how inexpensive the parts were. i took this saturday out and replace the thermostat, water pump and tempature switch, but had the same problem overheating. there are no sign of faulty hose or leaking that i can see.
Expert:  Amedee replied 5 years ago.

Ok.. does the heater put out good heat when the engine is starting to overheat?


Does the electric fan come on when the engine starts to overheat?

Customer: replied 5 years ago.
the fan does come on. the heater does not put out good heat when it is starting to overheat.
Expert:  Amedee replied 5 years ago.
Ok... Your coolant may be low, or there is an air pocket in your cooling system causing a low or not heat situation. You will have to bleed the system. With the engine cold take off the radiator cap and start the motor. as the engine warms up, keep the coolant topped off. the cap should be the highest point in the cooling system. If not there will be a bleeder screw that you can open to let out air. Here is a hint, Turn on the heat when the engine is warm, if it is blowing cold, than there is a huge air pocket and the system.


If there are no air pockets in the cooling system, then the only two things left would be a plugged radiator or a blown head gasket.

Customer: replied 5 years ago.
Relist: not confident with answer.
not confident with answer
Expert:  Amedee replied 5 years ago.



NO problem!


Did you have any further questions?


I can give you more ideas if you would like.

Edited by AMEDEE on 11/10/2010 at 3:21 AM EST

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