Heat problems with 2004 Impala. Already changed thermostat. Not the problem.? - Chevy Impala Forums

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Old 02-11-2008, 06:50 PM   #1 (permalink)
david w
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Heat problems with 2004 Impala. Already changed thermostat. Not the problem.?

Have had a radiator/coolant flush recommended to me, will this clean up hoses and heater core? Car has no leaks, coolant is full, fan operates normally. Heat comes and goes but is never truly warm.

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Old 02-11-2008, 08:33 PM   #2 (permalink)
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With the heater core yes the flush will help on the hoses no. You could check and see how hot the heater hoses are when the car is at operating temperature. If very warm to the hand on one hose and not the other then the heater core may be plugged. Do you live in a very hard water area? If you do then do not use the tap water when adding coolant mix to the car for the minerals will clog the heater and radiator cores. Use distilled water in the antifreeze mix.
It may also be a collapsed hose as well that is restricting the flow of coolant.


1977 Chevrolet Impala Sedan, 305, TH200, 2.56:1, 110K miles, 37 Lifetime Warranty Parts.
1989 GMC C1500 Sierra ECSB 350, HM290, 3.08:1, 338K miles, 15 Lifetime Warranty Parts.

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