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#1 |
Registered User
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Location: chimayo, nm, usa
Posts: 898
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Heater not warming
I recently got my 65 C10 running. Long story short, I installed the original 230 on there after being rebuilt with all new parts. New water pump, thermostat, hoses, radiator etc. I drove it yesterday to make a dump run and the heater would just not heat right. It was about 10 degrees outside but I warmed up the truck for a while and everything. It should of heated. The blower motor works great, just only luke warm at best warmth. Any ideas?
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#2 |
Registered User
Join Date: Mar 2008
Location: Tucson Arizona
Posts: 264
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Re: Heater not warming
If you installed a 180 degree or higher thermostat you should have heat.
Make sure your heater [water] lines are unrestructed with a blower you said works.. These heater are very basic so you should be able to see the problem.. Bob |
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#3 |
Senior Member
![]() Join Date: Jun 2010
Location: Illinois
Posts: 2,957
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Re: Heater not warming
Are the both hoses to the heater core very warm. May need to flush out the heater core. Even though it is a new thermostat, you might want to make sure it is opening.
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#4 |
Registered User
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Location: chimayo, nm, usa
Posts: 898
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Re: Heater not warming
Thanks for the ideas. It could be the core could be full of crud as the truck did sit for about 15 years. All the heater and radiator hoses are brand new and un restricted as far as I know. Unless I installed the thermostat upside down if that is even possible? The spring goes down right?
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#5 | |
Senior Member
![]() Join Date: Jun 2010
Location: Illinois
Posts: 2,957
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Re: Heater not warming
Quote:
Take both heater hoses off the engine and flush the core out both ways real good. I usually take my garden hose sprayer that has a tapered end on it and hold it tight against the core nipple and let it rip. You can just run water through it but it might not dislodge some stuff as good as a little pressure would. Just my thoughts anyway. |
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#6 |
Registered User
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Location: chimayo, nm, usa
Posts: 898
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Re: Heater not warming
I'll try that out as soon as we get a day at least a few degrees above freezing lol. Thanks!
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#7 |
Registered User
Join Date: Aug 2012
Location: Tooele, Utah
Posts: 327
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Re: Heater not warming
It was real cold here the other day (15 or so) and I had the same issue (would not heat). Ended up it was just not warm enough. Did you drive it or give up when you didn't get heat?
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1936 Chevrolet 1/2t 1964 Chevrolet C10 1964 Chevrolet C10 (sons) 1965 Chevrolet K10 Suburban 1969 Chevrolet C10 1937 Plymouth P4 |
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#8 |
Registered User
Join Date: Jan 2010
Location: Regina, SK
Posts: 804
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Re: Heater not warming
It gets down to -40F here and my heater gets plenty hot. I also run a 190 thermostat though. Cardboard over the radiator will help the truck heat up a little faster, cut a circle out in the center for some air movement and just keep an eye on your temp gauge.
Both in/out heater hoses should be equally hot. |
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#9 |
Registered User
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Location: chimayo, nm, usa
Posts: 898
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Re: Heater not warming
Well, I warmed it up for like 15 minutes then I drove the 6 miles one way to the trash station and back. It never did warm up much. I tried with the heater control both all the way in and all the way out. I also have a drivers side vent that I have to hold with my foot to keep closed so that didn't make matters any better. How could I fix that vent to stay closed?
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#10 |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Heater not warming
Make sure the fresh air vent is closed also. It's the one in the heater box that brings in fresh air from the cowl. The cable might be broken and the vent could be open letting too much cold air in. A quick fix for the vent by your foot would be cut a piece of cardboard out that you can cover the hole with. If you can't get it to stay in the hole you could duct tape it to the wall until spring. It aint pretty buy it keeps the cold air off your leg.
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#11 | |
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Location: chimayo, nm, usa
Posts: 898
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Re: Heater not warming
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#12 |
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Join Date: Oct 2010
Location: Independence,KS
Posts: 1,477
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Re: Heater not warming
What was the engine temp when you were driving? If the engine wasn't at a normal operating temp, you won't have much heat.
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#13 |
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Location: chimayo, nm, usa
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Re: Heater not warming
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#14 |
Registered User
Join Date: Oct 2010
Location: Independence,KS
Posts: 1,477
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Re: Heater not warming
That will be the key to the heater working.
Flushing the heater core would be a good plan, anyway, since you have all the other components new, you can keep the crud out of them. I would try putting a piece of cardboard in front of the radiator, as mentioned and drive it, if the heat is better, then the engine isn't warming up- not a big problem, actually very common on these trucks. BUT a prioity is to fix the temp gauge- especially with a new engine. |
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#15 | |
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Location: chimayo, nm, usa
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Re: Heater not warming
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#16 |
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Location: Nambe, New Mexico
Posts: 407
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Re: Heater not warming
Hey brotha I see you got you truck running!! Hows everything?
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1960 Chevy Stepside 2wd 1966 Chevy Fleetside 2wd 1965 Chevy Suburban 2wd 1965 Chevy Fleetside 4X4 1960 Chevy Fleetside BBW 2wd |
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#17 |
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Location: chimayo, nm, usa
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Re: Heater not warming
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#18 |
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Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
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Re: Heater not warming
For the manual vents...try adjusting the bracket that the handle goes through. If you slide the bracket (2 bolts) up a hair, it should put a little friction on the handle keeping it closed or opened in summer. Also...not uncommon for the gaskets to wear out on the vents causing them to become looser. Id try the bracket adjustment 1st though as the gaskets are a PITA to replace.
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1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
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#19 | |
Registered User
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Location: chimayo, nm, usa
Posts: 898
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Re: Heater not warming
Quote:
Hey thanks, it appears that a little friction is what it needs more than anything else. The Vent loop handle is not making any contact with the other part it goes through. I will try that. Thanks! |
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#20 |
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Location: Nambe, New Mexico
Posts: 407
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Re: Heater not warming
Theyre doing good bro, I drive my blue 65 almost everyday to work and the stepside just chills at home lol. Good luck with getting your heater going.
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1960 Chevy Stepside 2wd 1966 Chevy Fleetside 2wd 1965 Chevy Suburban 2wd 1965 Chevy Fleetside 4X4 1960 Chevy Fleetside BBW 2wd |
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#21 |
Registered User
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Location: chimayo, nm, usa
Posts: 898
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Re: Heater not warming
Blue 65 huh? I'm thinking and I can't remember seeing it on the road. Is it dark or light? I drive through your neighborhood into Santa Fe every day.
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#22 | |
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Location: Nambe, New Mexico
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Re: Heater not warming
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Posted via Mobile Device
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1960 Chevy Stepside 2wd 1966 Chevy Fleetside 2wd 1965 Chevy Suburban 2wd 1965 Chevy Fleetside 4X4 1960 Chevy Fleetside BBW 2wd |
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#23 | |
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Location: chimayo, nm, usa
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Re: Heater not warming
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#24 |
Registered User
Join Date: Sep 2012
Location: Lawton Oklahoma
Posts: 308
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Re: Heater not warming
Man;
I like the rig, right down to the All American Gun Rack in the rear window! Only thing missing from that Pic is a 30-06! Love it!
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#25 |
Registered User
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Location: Nambe, New Mexico
Posts: 407
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Re: Heater not warming
LOL thanks guys!! OG 4x4 isn't working right now I'm thinking maybe its some bad hubs.
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1960 Chevy Stepside 2wd 1966 Chevy Fleetside 2wd 1965 Chevy Suburban 2wd 1965 Chevy Fleetside 4X4 1960 Chevy Fleetside BBW 2wd |
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