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Old February 16th, 2012, 09:41 PM   #1
mudzuk21
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Default running hot blowing cold

so my temp gauge is saying its hot close to over heating but its blowing cold air but the engine radiator and hoses feel to be at normal heat theres no smoke cant smell anti-freeze burning changed the thermostat think thats what it was and nothing any ideas. thanks
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Old February 16th, 2012, 09:46 PM   #2
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bad t-stat????- well make that bad replacement t-stat? I've gone through 2 or 3 before I've gotten a good one lately. Stant's QC blows lately.
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Old February 17th, 2012, 05:56 AM   #3
Rob the plumber
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feel the coolant lines going to the heater core. Both should be hot. If only one is hot you probably have a clogged heater core. I've also seen a bad head gasket act this way as well.
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Old February 17th, 2012, 05:59 AM   #4
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Quote:
Originally Posted by rob the plumber View Post
feel the coolant lines going to the heater core. Both should be hot. If only one is hot you probably have a clogged heater core. I've also seen a bad head gasket act this way as well.
x2
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Old February 17th, 2012, 10:47 AM   #5
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aftermarket temp guage? Most stock gauges i have encountered don't do shit.

Any chance you can get a laser thermometer. A few checks and you may be able to find a cold spot somewhere and locate a possible blockage.

I would also flush the system, AF does not lose its cooling ability but it will lose its corrosion resistance over time.
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Old February 17th, 2012, 06:32 PM   #6
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Air in the system will also do this.

Check your water temp sensor, you can use a ohm meter to see what it's at to figure out if it is the sensor, gauge, etc.
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