Cooling Mods

Although the cooling system worked ok prior to my rebuild, I have tried to improve the set up to try and ensure I don't end up with trapped air in the system. I have basically added pipework from the header tank to the downstream side of the EWP. Originally this pipe went back into the head.

I have also moved the bleed from the top of the radiator to the thermostat housing.

This hose is fitted with a 4mm restrictor, the idea being that as the pump draws coolant, from the radiator and header tank, it creates a lower pressure in the header tank, this in turn should draw any air in the thermostat housing back into the header tank.

Made up a couple of pipes that fix to the rocker cover studs to keep it all looking tidy. Unfortunately not very easy to see in this picture.

The heater feed pipe (originally the heater return pipe into the back of the original water pump) is up stream of the EWP, with the heater valve closed all coolant flow is directed through the engine, with the valve open, some coolant flow will go through the heater and back to the header tank. All seems to work ok, just experimenting with water levels and pressure caps. Started with a 20 Psi cap but have now got this down to 13 Psi.