1968-72 Heater w/o AC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gregz68c10 · 07-02-2011, 01:48 PM

I've had poor heating for some time in my 1968 C10. While examining the LMC parts catalog, I realized I've had my heater hoses reversed. I am certain they were this way when I bought the pickup. I disassembled the truck, restored it and put it right back the way it was.

If the hoses are reversed, could this be the cause of my cool heater? The 5/8s hose has been plumbed off the pump and the 3/4 hose has been plumbed off the manifold. It appears in the catalog that it should be exactly opposite. Heater core is installed correctly with the 5/8 hose on the bottom.

It'll be a few days before I get the heater assembly reassembled properly for a test. Just thought I'd ask if anyone had encountered this.

Thank you.

07-02-2011, 01:48 PM	#1
gregz68c10 Registered User Join Date: Mar 2011 Location: Boise, ID Posts: 14	1968-72 Heater w/o AC I've had poor heating for some time in my 1968 C10. While examining the LMC parts catalog, I realized I've had my heater hoses reversed. I am certain they were this way when I bought the pickup. I disassembled the truck, restored it and put it right back the way it was. If the hoses are reversed, could this be the cause of my cool heater? The 5/8s hose has been plumbed off the pump and the 3/4 hose has been plumbed off the manifold. It appears in the catalog that it should be exactly opposite. Heater core is installed correctly with the 5/8 hose on the bottom. It'll be a few days before I get the heater assembly reassembled properly for a test. Just thought I'd ask if anyone had encountered this. Thank you.



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