Question about 2001 Chevrolet S-10

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My truck wont blow out any hot air, just cold. i put a new radiator and thermostat in it. it is full of anti freeze

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Try removing the Heater hoses from heater tubes(be careful not to break heater tubes off) then back flush heater core with garden hose(Don't use a lot of pressure). Jell from antifreeze builds up in the heater core and blocks the coolant flow. If it is easier, remove the heater hoses from the engine, that is safer. Back flush the heater from the hoses. To Back Flush (The hose coming from the water pump is the inlet)(Hose going to Manifold is outlet) Back flush outlet hose! To much water pressure may cause damage to heater core!!!! Do Not ues AIR!!!!

Posted on Sep 28, 2010

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Take out ac fuse an take hoses off heater core on fire wall take water hose an flush
out heatercore. then put hoses back on
check afreeze start engine turn heater on.

Posted on Feb 11, 2011

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get radiator cleaner put that in your expansion bottle .run it for about 20 miles to clean both the core for your radiator and core for your heater. then drain it .refill with 50/50 mix of anti freeze.put your heating on full .with the cap still off .run the engine till water starts to get hot .then refit the cap.

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Where do I put water in for radiator ?


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My heater blows cold air when car is stopped. i have installed a new water pump and the radiator is full of water.


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If still cold air, take to a shop that has evac/fill equipment; they will **** air out and repalce with coolant. About $80.

gerry

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2 Answers

I just changed the radiator. How much antifreeze do I put in?


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Heater blows cold air. After the truck gets warm if I turn the heat on and off and move the temp control lever from hot to cold and back up to hot it work. Today I noticed the temp gauge went to 215+...


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you may want to check the codition of the anti freeze or add just antifreeze. try this first. if thats not it you may have a thermostat sticking open this may have to be replaced.

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