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Old 02-03-2013, 09:14 AM
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heat issues.

when the truck gets warm i turn on my heat and it is hot for about 15 secs then goes cold. Is this a thermostat gone bad or something different?
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Old 02-03-2013, 09:31 AM
Can you hear the derail??

 

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Sounds like heater core
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Old 02-03-2013, 09:36 AM
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is there any way to check to make sure that is what it is?
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Old 02-09-2013, 08:34 AM
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i am going to change out my heater core today. I am going to drain out the coolant out of the radiator what coolant should i get to replace it with?
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Old 02-09-2013, 10:40 AM
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Try back flushing the heater core prior to replacing. Remove hoses and connect garden hose to return side, then reverse to check the flow.
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Old 02-09-2013, 01:07 PM
Can you hear the derail??

 

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I used 2 gallons of extended life coolant and 4-5 gallons of purified water
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Old 02-09-2013, 03:24 PM
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so i replaced my heater core today, i am glad i didnt take it to a shop and let them charge me for 8 hours worth of work it was simple. But was not the issue... i had to buy too heater cores because they offer a light duty one and a heavy duty one and i wasnt sure which one it took. any way after getting it all back together and driving back to the parts store when the truck got heated up i turned on the heat and it still blew cold air out... now i am upset ha so i returned the light duty heater core and told the guy that it didnt fix my problem. He recommended a radiator cap and sure enough for 6.99 before i left the drive way it was blowing out hot air.
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Old 02-09-2013, 03:51 PM
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That's actually funny as hell, mine doesn't have a radiator cap
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Old 02-09-2013, 04:00 PM
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why not? Isnt that kinda important
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Old 02-09-2013, 04:20 PM
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Quote:
Originally Posted by dirtscooter13 View Post
why not? Isnt that kinda important
It's totally important. It affects the boiling point.
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