flow can differ somewhat between different brands of engine
, but a typical flow is as follows:
-From the circulation pump into the block, down the length of the block and up into the cylinder head
. From the head
there are usually two options:
1. Out of the head and into the exhaust manifold, and from the exhaust manifold thru the thermostat housing and to the heat exchanger. Or
2. Out of the head via the thermostat housing and then into the exhaust manifold and then to the heat exchanger.
Sometimes the return coolant from the heat exchanger goes thru the oil cooler before returning to the circ pump. Sometimes a small amount of coolant is diverted from the block to the oil cooler, and sometimes the oil cooler is cooled by sea water
and it's not in the coolant circuit at all.
The above are probably the more common flow paths, but there are always exceptions to the rule