Quote:
Originally Posted by Billy Nees
Alright, I am pretty sure that I've got it. With the thermostat closed, coolant goes through the heater core and into the rear of the block and is circulated through the block and head by the water pump. When the thermostat opens, water goes into the LOWER radiator hose AND through the block and head. It goes through the radiator and into the UPPER radiator hose where it is circulated through the block and head until the thermostat closes . Clear as mud....
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OK, I just got finished getting "verbally abused" by my engineer buddy about the laws of physics. So I'm going to start from scratch about how this thing flows.
The coolant goes FROM the rear of the block and through the heater core. It then flows over the hot side of the thermostat and into the water pump where it circulates through the block and head. When the coolant flowing through the heater core and over the hot side of the thermostat gets hot enough, it opens the thermostat letting cold coolant from the radiator flow past the COLD side of the thermostat into the water pump( the thermostat really IS backwards!). Suction from the pump pulling cold coolant from the radiator (lower hose) lets hot coolant go from the top of the head (upper hose) into the radiator...
This is as clear as mud!