Quote:
Originally Posted by Gene F
Can I ask a question. Who cares if it ends up at the top end of the hose, up against the radiator neck. I mean why do we care? It still will slow down the water.
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It doesn't open until the hot water gets to it. Close to the engine it will open sooner. The engine will be at a higher temp before the hot water migrates to the top of the hose since water won't be flowing with it closed.
The small holes in the thermostat is to let air out of the system when you refill it.