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| | | | Joined: Jun 2009 Posts: 2,201 Shop Shark | | Shop Shark Joined: Jun 2009 Posts: 2,201 | Where and how were the cable operated shut off valves mounted? I bought a new one from Napa and trying to decide where the best place to install it would be.
I could maybe put it inside the cab between the heater and firewall. I have about 4 to 5 inches there.
My second thought is that the original location, wherever that is, had some forethought applied already so there would be no need for me to damage my brain any further to pick a location.
The truck is a 53 Chevy/GMC on a 73 Suburban frame and drivetrain.
| | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | original cable operated valves were the ranco valves with temperature controls that were around the heater in the cab, or later inside the heater box - eventually they all result in water leaking into the cab, usually unnoticed until it was a real mess .... IMO the best place for the more modern style cable operated on/off valves is in the hose just before it goes thru the firewall, if it leaks it's outside
Bill | | | | | Joined: Jun 2009 Posts: 2,201 Shop Shark | | Shop Shark Joined: Jun 2009 Posts: 2,201 | Thanks Bill. I went ahead and installed it between the heater and the firewall. I can operate it by hand for the time being until I fabricate a bracket to attach the cable to next weekend. As part of that operation, I may just take your advice and move it outside.
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | You want to put it in the inlet hose.
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: Jun 2009 Posts: 2,201 Shop Shark | | Shop Shark Joined: Jun 2009 Posts: 2,201 | OK, why would that matter? It just stops or restricts the flow in the loop doesn't it? I installed it in the hose that goes from the intake on the 350 engine. | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | When it's off it stops the pressure from the water pump on the heater core.
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| | | | | Joined: Jun 2009 Posts: 2,201 Shop Shark | | Shop Shark Joined: Jun 2009 Posts: 2,201 | Makes sense, But doesn't the pump suck the water out of the heater core on a small block V8?
You are right, the old heater core doesn't need any extra pressure. | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | wouldn't the way to stop having cooling system pressure in the heater core be to shut off both hoses?  either hose is part of the same closed system, which makes it worth considering the integrity of the core when choosing a rad pressure cap Bill | | |
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