XAXEXF

Need some advise on coolant flow on a 250 Alloy Head Crossflow.

I have installed a Cain Inlet Manifold on a 250. This manifold does not have a coolant jacket so I have blocked off the fitting on the head that supplies coolant to the standard manifold. With the standard manifold this coolant exits the head via a hose to the inlet manifold, then exits rear of manifold and connects with a `T' piece to the heater return hose leading to the water pump. My workshop mannual states that this plumbing supplies the water pump with coolant when the thermostat is closed.

Will this cause any problems now that this is not connected, I assume this plumbing helps coolant flow before thermostat opens. Any advice would be greatly appreciated.

I8AHSV

The alloy headed 250 crosflows are polution models (i think) so I'll be guessing that the coolent flows into the intake to atomize the petrol/air mixture better. This is good to keep the polution down...etc but is not so good for performance because hotter air means less power. I am guessing that's the reason why the intake doesn't have any provisions for the coolant passages... The head on the 250 would get it's coolant from the block & the water pump just helps the coolant circulation so as far as I can see it don't expect to pass any polution tests in the near future, instead expect some bhp gains...