I have another question for you guys... As you probably know, I am putting a rebuilt 302 back together. It had a water pipe sticking out of the top of the manifold, which I presume, connects to the thermostat housing via a little hose. It has like 3 different connectors hanging off of it and it is all corroded. Would it be ok if I just plugged the hole on the manifold and on the thermostat housing? Or would that cause problems? Thanks!
I want to say that some, or most of us, have done away with any emmisions related components. It sounds like your describing a ported vacuum switch. Pluging these means that you know how and by what means you will be controling advancement. Usually they are bad and instead of getting another and clinging on to the misc vacuum hoses going who knows where, pluging makes it cleaner looking also ...yank yank, toss. I replaced my t stat housing with one that has no port openings, except the cooling bypass of course. It was chrome and it seemed to want to leak no matter what. So I ended up pluging a cast one and no leaks... Some have to keep these things intact and fix it per specifications or what is available. The port outlet on the manifold I beleive needs to be connected to an in/outlet on the W/P, it should have gone to the heater core, I believe. So now I ask the guys, which way do we route the cooling hoses? I think knowing the direction of flow might help here...
Please correct if I'm wrong, but I believe the port Madman is talking about is near the front of the manifold and is connected to the top fitting of the heater core and the bottom heater hose is connected to the bottom fitting on the water pump. The top fitting of the water pump is the bypass to the T-stat. Unable to check right now, pulling the grave shift @ work.
the fitting on the top of the manifold is the heater out connection. The fitting next to the thermostat is the bypass, do not plug this fitting. It connects to the waterpump and allows the coolent to circulate until the thermostat opens. The other fitting next to the bypass on the waterpump is the return for the heater. The two heater connections can be joined or pluged with no problems.
Do you have the by-pass hose connected? it goes from the thermostat housing to the pump with a short hose that is shaped a bit like a question mark.
Yes, I do now. I hooked up to the closest (right) port on water pump. The other port, on the water pump, I hooked a plugged hose up to.