I have a little raw water
MD5, which I built a new thermostat housing for.
Looking at the cooling
circuit, I don't fully understand what controls the direction of water
flow. Here's the system (picture would be best ofcourse), water
enters via saildrive
-> strainer -> impellor pump -> thermostat housing -> NOW, the water either
goes straight out the other side of the thermostat housing and then back into the head
(via a hole directly inline with the inlet hole), or
it can go out the top of the housing to the exhaust
it can go through the thermostat (when open - it opens inwards, in to the engine).
Seems to me that the water would always find the easiest path is straight out the exhaust
The original housing is very corroded, but I recall
the inlet and outlet (out to head) being linked to the thermstat chamber and exhaust outlet via a fairly small port. Is this intended to restrict flow and force it through the head
? In that case the thermostat would be controlling water by restricting water exiting the head, not entering it.
In case your wondering, my engine
Overheating Raw-Water Cooled Volvo
Thanks for your thoughts.