Quote:
Originally Posted by lsmalley
If the coolant leaves the engine by the oil filter, then goes into the heater core, wouldn't the heater valve be on the side where the coolant was entering the heater core and not exiting the heater core? I've never been able to get a handle on the air flow for vacuum or the coolant flow of the m103.
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It doesn't really matter where the valve is as long as it completely blocks flow to the core. It was probably a matter of packaging that it ended up on the downstream side.
Duke