Question about 2001 Chevrolet Blazer

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2001 blazer - i have changed radiater,heatercore,waterpump and 2 thermostats - still overheating on me? coolant level is fine until it gets hot and boils out overflow tank? help!

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  • alisonverhel Jun 29, 2009

    is there an answer for this problem out there?

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  • Chevrolet Master
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Check to make sure your clutch cooling fan is working.turn it by hand it should have resistance.if its real loose and leaking silicone oil replace it.

Posted on Jun 29, 2009

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  • Chevrolet Master
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Are your antifreeze 50/50 mix. Too much antifreeze ratio will cause over heating, the antifreeze will start to gel when it get's hot causing poor circulation. Water is the best liquid for heat transfer but it will also boil over and steam out the radiator cap, that is why antifreeze is added to keep this from happening. Looks like you have covered most of the base on your cooling system, Did you do a complete cooling system flush to get some of the corrosion out and it's been know for the orange antifreeze when gelled will clog up the cooling system. Make surer you have 50/50 mix and if you not sure you can buy a antifreeze meter at any large parts store like Auto Zone. Keep me posted, be glad to help.

Posted on Jun 29, 2009

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1 Answer

Overheating


Your overheating problems can have several possible causes.
1) Airlock in heating system - solution - bleed air from cooling system.
2) Radiator blocked - solution - drain and flush radiator
3) Failed waterpump - solution - fit new waterpump
4) Engine thermostat stuck in closed position - solution - fit new thermostat
5) Electric cooling fan (if fitted) failing to operate - solution - check fan, fan operating switch, all wiring and connectors
6) Not enough coolant in system - solution - check and top up to required level. Also check all hoses for sign of leakage.
7) Faulty temperature gauge giving incorrect reading.

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