Thread: interior heat

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  1. #1 interior heat 
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    Does anyone have any suggestions on where to start looking for problem with heating system on an 04 grand prix. I had the cooling system flushed about
    2 months ago. It seemed to work fine, then one day I have heat and now it is barely warm. Any help or suggestions would really be appreciated. I changed
    the thermostat about a month ago. Any ideas on how to back flush heater core would be great.
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  2. #2 Re: interior heat 
    Killa Bee Scottydoggs's Avatar
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    take the 2 heater core hoses off the alt bracket on the back of the engine, put a garden hose to one of the open hoses, and flush it, then do the other hose, fill the core, and hoses with water, put them back on the car.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: interior heat 
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    would any kind of cleaning solution or chemical help clean it?
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  4. #4 Re: interior heat 
    Moderator dsmuts's Avatar
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    clr would help a little but make sure you have it all flushed out before you put it back together.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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