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2004 Chevrolet Implaa running hot
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Thosell
New User
Aug 18, 2010, 4:42 PM
Post #1 of 2
(3597 views)
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2004 Chevrolet Implaa running hot
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2004 Chevrolet Impala 3.4L 85k miles, running hot.
Started running hot a few weeks ago. Had never changed antifreeze - needed bad - a lot of sludge. Flushed with commercial product and replaced antifreeze. No problems for a few weeks. Started running hot the other day, so I replaced the thermostat. First run was ok, then next day started overheating again and the needle was fluctuating a lot. Would go up and down, fairly quickly. Yesterday, replaced the heat sensor. First run, no problems, held a steady 210 degrees. This morning 72 degree temps outside, started running hot again, got up to 230-240 degrees, then went back down while driving. Drove home this afternoon, 90+ degrees outside, and stayed at a steady 200-210 degrees.
Should I replace the thermostat again? I have no leaks anywhere, (and water pump is not leaking). I have never drove the car hot. I have stopped everytime it has ran hot and turned it off. Antifreeze is 50 - 50 solution. Any advice would be greatly appreciated.
Thanks,
Thosell
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 18, 2010, 5:26 PM
Post #2 of 2
(3592 views)
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Re: 2004 Chevrolet Implaa running hot
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If this was loaded up with Dexcool sludge then you likely haven't flushed it sufficiently. It takes a lot of flushing to get all that stuff out of there. The best way is add some more flush to it and run it for a while and then remove the thermostat and the upper radiator hose and run the engine with a hose in the radiator feeding it fresh water. Your going to have to be careful where you do this too because the coolant will stain the ground and kill animals. Keep running it until it runs clear and put the thermostat back in.
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