Hello, and thank you for choosing Just Answer!
I wrote an article that will run you through a little about 10 minute test procedure that will get you pointed in the riight direction on the overheating problem. I KNOW it has helped ALOT of people, too, because it is ranked #1 on the site (a popular one), as well as Google. I also get 'thank you emails from people almost every day about it.
Anyways, here is the link. If you still need help or instructions for the repair, just let me know what you find.
I don't know WHERE that came from...
If there is an air pocket in the system, all you have to do is run the heater on high, and wait until the thermostat opens up, and refill...
PLUS, if there were air bubble in the system, the heater would not get hot...
If you read my article, it tells you all about it.
If you have had your lincoln at the dealer for this problem before,and they worked on it, I would take it back to them and tell them they did not repair the problem.
how did they check the water pump, if the impellers are coroded off the shaft, the only way to make sure it is still good is to remove it from the car, i've been reading about customers with water pump problems and cooling fan problems.
and to answer ase_master327's question.
the lincoln LS has 2 seperate heater cores, 2 seperate ac evaporator cores, 2 hot water control valves(with 8 hoses coming off of it),a thermostat, radiator, 2 seperate cooling system air bleeders, several cooling system bipass hoses, and a cooling fan that runs off of power steering fluid.
just running the heater will not get the air out of this system,....believe me!!!
I see, it could be a number of things,from the radiator being clogged,a water pump with corroded impellors, a cooling fan not cooling properly, or the water valves.
but it sounds like the water valves are working, because it would blow hot air even with the ac on if they stopped working.
this is one of the toughest cars to diag. for everything...
does the engine cooling fan run on high with the ac on? if not i would say the fan is the problem.
the water pump would be my next guess, but it's a fairly expensive fix without knowing for sure.
if your coolant has always been clean and not brown ever, i would rule ou the radiator.
i hope i'm helping you out here.
they don't usually leak, it's an internal problem, the only signs are the overheating.
heres a pic of the internals.
the empellers come off the shaft, then the water can't get moved through the radiator, so your heater cores are acting as the radiator.
there is no way to tell if the water pump is internally bad, with out taking it off the car.
the pump cost around $75, but this is a hard job,I would leave it to a professional, that knows how to bleed the cooling system after they replace the pump. i would find another dealership to take your car to.
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