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Mod | | | Forums66 Topics128,049 Posts1,055,649 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jan 2011 Posts: 24 New Guy | | New Guy Joined: Jan 2011 Posts: 24 | I usually don't drive my 54 pick-up in the winter but just notice yesterday that the heater is blowing cold air. The rest of the cooling system is working fine. Where should I start looking for the problem? | | | | | Joined: Feb 2001 Posts: 1,094 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 1,094 | Look under the hood on the heater hoses and see if there is a valve, if so it may be turned off.
Tommy
59 apache 1/2t
261 short stepside
| | | | | Joined: Jan 2011 Posts: 24 New Guy | | New Guy Joined: Jan 2011 Posts: 24 | Thanks, No valve, it worked fine last year. | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | You may need to back-flush the heater core.
Also make sure the radiator is full.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | First is the therm. working for the engine to get to operating temp? With the engine warmed up & the rad full grab the heater hoses with your hand. Both hoses should be hot enough that you can only hold on for a few seconds. If one hose is hotter then the other then the restriction is were that hose came from. If both are cold your engine is not warming up. You can blast a little air in the heater core with a rag around the blow gun to flush it out.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Jan 2005 Posts: 164 Shop Shark | | Shop Shark Joined: Jan 2005 Posts: 164 | If one hose is hotter then the other then the restriction is were that hose came from. Wouldn't the hose going to the heater be hotter than the one coming from it in normal operation? | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Wouldn't the hose going to the heater be hotter than the one coming from it in normal operation? No. If circulation is good they will both be about the same.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
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