[TedRamAirII]

Just thinkin' out loud here......but you have pressurized coolant from both heads into the manifold. There wont be much coolant "flowing through" it. To make it work better it may have to come through the manifold and then into heater core inlet,correct? In other words keep the left side as it is, and then plumb from the right side of the manifold to the heater core inlet, and block off the right head heater passage.

[b-man]

Originally Posted by TedRamAirII

Just thinkin' out loud here......but you have pressurized coolant from both heads into the manifold. There wont be much coolant "flowing through" it. To make it work better it may have to come through the manifold and then into heater core inlet,correct? In other words keep the left side as it is, and then plumb from the right side of the manifold to the heater core inlet, and block off the right head heater passage.

The pressurized coolant will flow to the area of lower pressure, towards the heater core. There will be plenty of coolant flow through the crossover from one head, and from both heads to the heater core.

[TedRamAirII]

Originally Posted by b-man

The pressurized coolant will flow to the area of lower pressure, towards the heater core. There will be plenty of coolant flow through the crossover from one head, and from both heads to the heater core.

You have coolant pressure going in from 2 sides, the one tee with the heater inlet will be "slightly" lower, but not by much. I dont think I would call it "plenty". I would say the heater core is getting flow, but not the manifold.