Coolant flow, V6
| Coolant flow, V6 |
| Thermostat closed |
From the coolant pump - through a channel in the cylinder block - up through the cylinder heads - through a hose, circulation pump and auxiliary heater to the heat exchanger - through a return hose/pipe from the heat exchanger - back to the thermostat housing - back to the coolant pump.
From the coolant pump - through a channel in the cylinder block - up through the cylinder heads - through a bypass channel - back to the coolant pump (Internal circulation).
Some of the flow goes out from the cylinder block - through pipes to the oil cooler - through pipes back to the pump.
| With the thermostat normally open |
From the coolant pump - through a channel in the cylinder block - up through the cylinder heads - through the radiator - through the thermostat housing (past the thermostat) - back to the coolant pump.
Some of the flow goes out from the cylinder block - through a hose to the auxiliary heater - on through a hose to the heat exchanger - through a return hose/pipe from the heat exchanger back through the thermostat housing to the pump.
Some of the flow goes out from the cylinder block - through pipes to the oil cooler - through pipes back to the pump.
| With the thermostat fully open |
The thermostat closes the lower passage (bypass) of the thermostat housing. Most of the coolant then passes through the radiator. The rest passes the oil cooler and heat exchanger.
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