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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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| | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The one under the therm. is the pressure hose. It will go to the lowest connection on the heater. The higher outlet on the heater is the return & goes to the water pump.. Somewhere around that era they started using 5/8 hoses on the pressure side & 3/4 on the return. If that's the case it is obvious which one goes where. If there is a valve in the circuit the pressure side will go to the valve first.
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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