Quote:
Originally Posted by winmutt
FSM specifies that when engine reaches 60-70*c to close off the filler tube from the expansion tank (I guess they mean pinch it off). This probably forces water into head?
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Until the thermostat opens, the radiator and the expansion tank are isolated from the cooling system.
I'm not grasping how pinching the hose would force coolant into the head prior to any thermostat operation...............??