so where is the best place to install the shut off vavle for the heater lines?...and does it really make the interior alot cooler?..is this an idiot proof instalation?
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Heater shutoffs, eh? Mine are near the firewall in the heater lines coming from the
engine. Pretty simple I would guess, but I did not install them. Mine are merely valves
like on the radiator but connected inline to the heater hoses. One for each line. No, it does not make the interior any cooler. You are merely isolating the heater core from the engine. So you are not circulating coolant thru the heater core. Remember you still have the tubes running directly under the shifter area going to the front radiator. This gets you plenty of warm air. I don't think installing them should be difficult.
engine. Pretty simple I would guess, but I did not install them. Mine are merely valves
like on the radiator but connected inline to the heater hoses. One for each line. No, it does not make the interior any cooler. You are merely isolating the heater core from the engine. So you are not circulating coolant thru the heater core. Remember you still have the tubes running directly under the shifter area going to the front radiator. This gets you plenty of warm air. I don't think installing them should be difficult.
I believe they actually will keep the car interior a little bit cooler since they actually isolate the heater core and the tubes that are under the console area. Since you are shutting off the flow in the engine compartment the hot water won't get in those pipes either. My big concern is that the water then just sits in the pipes and/or heater core and may lead to corrosion. I asked around while I was doing my restoration and apparently there is no easy (or cheap)way to replace those pipes since they are welded in.
They allow the A/C to cool the car without first having to overcome the hot water trickling thru the heater core, which is fastened directly in front of the A/C evaporator. It also prevents you being killed or severely injured when (not IF) the 2 short heater hoses under the dash rupture at high engine speeds and fog the windshield opaque while scalding your foot. Installation is idiot-proof if you can select a pair of 1/4-turn brass valves at your local hardware store, and the right size pipe nipples to push in the heater hoses. Alternatively, order a complete kit from the usual Pantera parts suppliers. Cut the hoses in a place that will allow you to reach the on/off levers for the new valves. Some guys put them down near the rt rocker panel and simply reach underneath to turn them on/off, or place them up near the surge tank cap, opening the decklid to turn off/on. This of course means adding some extra length of heater hoses and clamping the valves down so the extra hoses don't flop against headers or something else damaging.
if the hoses are std 5\8 rubber hose, you could probly install the restrictor ford used in the psi side to the heater core. the restrictor came in 88 to 93 mustang in the heater hose. there should be plenty to find int the salvage yards now, i know i have seen a few.