I'm building a 79 SBC (old style) 350 and have a new stock water pump...what hose and where does it go from the top of the water pump to wherever? Heater hose? Or can I just leave it plugged. No A/C I just need a heater/defroster, etc...
New thermostat, yet have you ever tried a decrease temp thermostat? Our RV 479 CI used to run a million/2 way up and three/4 in end/bypass and close to the pink line up mountain roads. I placed a decrease thermostat and it runs a million/4 and <a million/2 end/bypass. severe temps are dry out electric powered cord rubber insulators and that i have had to replace diverse the ignition wires. also it is frustrating to crank reason you have become vapor lock. The gas contained in the gas is so warm is turns to vapor and the gas pump can no longer longer suck gas because it isn't reliable adequate to suck vapor, in ordinary words liquid gas. if so, flooded start up tactics might want to artwork. floor the gas, shop it floored and crank the starter. Pump like loopy also, yet shop you foot in truth floored. it would want to start up.
heater hose should originate from the passenger side of the firewall and go to the water pump. if you plug it then no hot water will go to your heater core and you wont have heat/defrost just air that is the same temp as outside air
The hose runs from the pump to the heater core on the pass side firewall. There should be a hose that comes back out and connects to the top of the intake manifold to return the coolant back to the engine also.
As a rule Chevy used two different sizes of heater hoses the one from the water pump should be 3/4 hose and the one from the top of the intake manifold should be 5/8. You should be able to see the different in sizes with the naked eye, they should go to the heater core inlet and outlet on the right side of your engine compartmant. (which is the passenger side)
