heater hose roughting.

[MalibuSSwagon]

Originally Posted by wilkin250r

Connected to the intake manifold is correct, hot water coming out of the engine is going into the radiator core.

I believe automatic transmissions had the heater hose routed back to the radiator, probably to provide a little bit of early heat to the transmission cooler inside the radiator. Manual transmissions had the heater hose routed back to the water pump.

My truck is a factory manual trans and has the heater core output connected to the radiator.