Quote:
Originally Posted by Daox
You think this happens even with the water pump cycling the water in the block? I would think it would be enough flow to eliminate hot spots... thats its job after all. Perhaps at low rpms... I can't say for certainty.
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I don't think the water "cycles" in the block at all. I think Christ is right on the money. Think about it, the heater doesn't do crap until the thermostat opens, because the cold water is just trapped in there. The water pump is "sucking" coolant in from the bottom of the radiator. That water would have to have a place to go, if the thermostat is closed it doesn't, so the pump is just spinning it's proverbial wheels.
I don't think there is much power behind the water pumps design. I have always wondered this, and I have always assumed that the pump sort of "moves" water around but not with a whole lot of force.
I can certainly see that if the water gets hot enough right at the thermostat as Christ says and it opens allow some hot water thru then the pumps push is enough to let some of that cold water sneak past the thermostat. But it makes total sense that the thermostat MAY (not
completely convinced that it will do as Christ suggests) but it makes a heck of a lot of sense.
Brian