Car overheats with a loud whine / squeal when getting too hot, about 260 degrees (210 thermostat)
I believe there could be an air pocket in the coolant reservoir, force water through the block, the best you can, with a garden hose, or you might have a faulty thermostat,hope this helps!
Testimonial: "I thought that myself. I changed the pump because of bearings causing the fan pulley to wobble. The radiator seems full, and the overflow is full, but (Obviously) the block was drained when the pump came out Where would I hook up a hose if not the already full overflow?"
"I thought that myself. I changed the pump because of bearings causing the fan pulley to wobble. The radiator seems full, and the overflow is full, but (Obviously) the block was drained when the pump came out Where would I hook up a hose if not the already full overflow?"
Sorry for a late reply, did you figure it out?
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SOURCE: Engine Temperature Guage on Dashboard indicates overheating
Hi and welcome to FixYa,
Offhand, your described condition indicates a sticking thermostat, that is there is considerable delay before the thermostat opens. It is also possible that there is some restriction wherein the thermostat is not opening completely when the triggering temperature has been reached. As a test and to confirm, you could try temporarily removing the thermostat and operate the engine without one; observe temperature. The side effect of this test is that it would take some time to warm-up the engine, but operationally should not cause anything untoward. Of course, care has to be exercised that the gasket would still be intact.
Good luck and thank you for using FixYa.
SOURCE: 2002 mercury villager water circulation problem
Check the new thermostat by putting it in a pan of water and bringing it to a low boil. See that it opens. It is possible to get bad parts off the shelf.
SOURCE: my 2004 TrailBlazer overheats in running only I
check your fan clutch, very typical problem on these 4.2L engines. These fan clutches are electronically controlled. Another issue may be clogged radiator.
Hi Jonny, While the engine is cold the thermostat will be closed, allowing coolant circulation around the engine block and cylinder head but not through the radiator. Only when the engine has reached normal operating temperature will circulation be noted in the radiator. A good test is to remove the thermostat while the engine is cold , start the engine with the radiator pressure cap removed and observe flow. If as I suspect it is there, refit the thermostat and check the heat gauge. If all remains well there is no problem. If the engine overheats replace another thermostat. If there is no circulation with the thermostat removed, there is a blockage in the cooling galleries of the engine. If chemical flushing does not clear it, it will require disassembly of the engine with careful step by step inspection at every stage. If the cylinder head(s) had been removed I would suggest making sure of the galleries not being blocked by installing the gaskets incorrectly. Regards John
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