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dhonsey
Novice
Oct 30, 2009, 6:14 PM
Post #1 of 15
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Not much heat????
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I have a 2000 Chevy Tahoe with the 5.3 V8 with 150000 miles. I recently noticed that the heat was not very good so i changed the thermostat but the engine temp was fine before and after i did that but still bad heat. The coolent level is fine. Where do i go from here???
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 30, 2009, 6:20 PM
Post #2 of 15
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Re: Not much heat????
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You may have some Dexcool starting to plug up the heater core. If that's the case you will have to add some flush chemicals and thoroughly flush the cooling system including flushing the core with water pressure from a garden hose. You may have to do this a few times.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dhonsey
Novice
Oct 30, 2009, 6:29 PM
Post #3 of 15
(1783 views)
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Re: Not much heat????
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Can you get the chemicals at a auto parts store?
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Loren Champlain Sr
Veteran
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Oct 30, 2009, 6:30 PM
Post #4 of 15
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Re: Not much heat????
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>>You may have some Dexcool starting to plug up the heater core>>
Oh, HT, say it isn't so.... 
Loren
SW Washington
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 30, 2009, 6:36 PM
Post #5 of 15
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Re: Not much heat????
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Yes Loren, it happens but there are reasons it happens, mostly customer neglect and air in the system but we won't get into that right now.
Yes dhonsey,
Just ask then for their best cooling system flush.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Loren Champlain Sr
Veteran
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Oct 30, 2009, 6:40 PM
Post #6 of 15
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Re: Not much heat????
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Hope you know, I was just teasin' you. 
Loren
SW Washington
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dhonsey
Novice
Oct 30, 2009, 6:41 PM
Post #7 of 15
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Re: Not much heat????
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Im pretty sure the coolent is good in the truck i just had it changed around 30,000 miles ago... so do u think it would already be pluging up. I know what u mean with Dexcool how it plugs up i used to work at a VIOC but you could always see that in the resovore.
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Hammer Time
Ultimate Carjunky
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Oct 30, 2009, 6:43 PM
Post #8 of 15
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Re: Not much heat????
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Feel both heater hoses where they go into the firewall. If they are both hot to the touch, the core is OK. If either one is not good and hot, the core is plugged.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dhonsey
Novice
Oct 30, 2009, 6:48 PM
Post #9 of 15
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Re: Not much heat????
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I'll give that a try. Thank you
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dhonsey
Novice
Oct 31, 2009, 12:54 PM
Post #10 of 15
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Re: Not much heat????
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the flush didnt work.. would it have anythimg to do with missing the cabinair filter???
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Hammer Time
Ultimate Carjunky
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Oct 31, 2009, 12:58 PM
Post #11 of 15
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Re: Not much heat????
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Are the 2 hoses hot or not?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dhonsey
Novice
Oct 31, 2009, 12:59 PM
Post #12 of 15
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Re: Not much heat????
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yes
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Hammer Time
Ultimate Carjunky
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Oct 31, 2009, 1:00 PM
Post #13 of 15
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Re: Not much heat????
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The heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dhonsey
Novice
Oct 31, 2009, 1:02 PM
Post #14 of 15
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Re: Not much heat????
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any simple ways to do that??
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Hammer Time
Ultimate Carjunky
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Oct 31, 2009, 1:04 PM
Post #15 of 15
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Re: Not much heat????
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Nope
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