Question about 2001 Chevrolet S-10

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Chevy S10 overheated, now heat doesn't work, leaking coolant

Engine Cooling problem
2001 Chevy S-10 4 cyl Two Wheel Drive Automatic 168000 miles

Ok... coldest day yet. New (junkyard engine 30k miles on it) Day before noticed coolant was a little low. Driving on the highway the temp guage spiked ( i wasdriving a little hard) so i pulled over let it cool for a minute anddumped 3 cups of H2O in the reserve. Started it up and drove alongslower. At this point the heater in the car died... just blowing coldair. Got off at my exit and at the stopsign, the car just died. After amin i got it to kick over, but noticed coolant leaking out from under the hood (figured it was boiling andoverflowing). Drove it almost 10 minutes to work, still no heat, andtemp gauge seemed normal.

I'm hoping it's the thermostat. I'd appreciate any help you can give me. Thanks!!!!

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  • jmayr Dec 22, 2008

    nahhh... no water in the pass side on the floor thinking it might very well be a low level of coolant. I'll try that first and see. i imagine the thermostat is located at the engine end of the top radiator hose?

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When an engine is overheating and then the temp drops on the guage, it's usually a sign that the coolant is not touching the temp sensor. There's no coolant in the engine. Putting water in the overflow tank won't solve this. Take the radiator cap off after the engine cools and put coolant in the radiator. you might have to crank the engine and do this several times, as the engine can develop air pockets that won't allow the coolant to travel inside the engine. If you don't see any leaks, and it still uses coolant, you've probably got a blown head gasket. Check for water on the plugs, check cylinder compression. If it slowly uses coolant, try putting a large box of pepper in the radiator or some of that radiator seal copper flakes.

Posted on Dec 22, 2008

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Blow cold air could mean low coolant, or thermostat, or heater core (heater core is behind usually behind the glove box) to tell if the heat core went there would have been alot of water inside on the passagener front side.

Posted on Dec 22, 2008

  • karen davis Dec 22, 2008

    we had the same problem with our car it was very low on coolant which cause it to blow coold air. i will ask my husband where the thermostat is.

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If it is blowing cold air there is no water getting to the heater core. First check oil and make sure there are no signs of water. It is wierd that the temp reads normal, so definately check the thermostat and the temp sending unit. (it should be next to the thermostat).

Posted on Dec 22, 2008

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