[Auto Futura-CAV Factory]

Hi Ian
Thank you for your input. I must agree on the header feed pipe. IT HAS TO BE CONNECTED TO WATERPUMP.I have had a car brought to me where the chap had fitted his own engine, and fitted the header tank hose down onto the thermostat bypass. Need I say more...? The same scenario as Randy.

The new CAV's are not plumbed into the heater hoses. That way the owner can check feed to engine, and when the ^@%$^ hits the fan in the heater circuit, one can blank it of and still drive home easily.

Points to remember: Header tank feed onto waterpump. Heater is a loop..from thermostat by-pass through heater core and back to waterpump. Header tank level must be higher than thermostat. ( we sell bigger and higher tanks that would fit earler CAV's) Remove thermo sender or something similar from highest point on engine, and bleed out any air. Even lift rear of car, BUT GET ALL THE AIR OUT.

Please shout if I can help further.
Good luck!
Jean