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    boatwrij's Avatar
    boatwrij Posts: 1, Reputation: 1
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    #1

    Jan 2, 2010, 10:05 AM
    2001 pontiac aztek running hot
    2001 Pontiac Aztek is running hot. Do I need to change the thermostat or could the radiator just need flushing? Thermostat has been changed not long ago.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jan 2, 2010, 10:24 AM

    Try reverse flushing the cooling system. If the problem persists, consider replacing the radiator. Mineral (phosphate scale) build-up may be blocking passages in the radiator/heater core. This link may help:

    https://www.askmehelpdesk.com/cars-t...tml#post235973

    Afterwards, drain and refill with a 50/50 mixture of recommended antifreeze and distilled water.
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