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Old 05-02-2002, 09:22 PM   #5
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Member#: 1109
Join Date: Mar 2000
Chapter/Region: MAIC
Location: Reston, VA
1999 Suzuki Samurai


The fitting on the back of the head would be a source for cooling water, not a return - all water in the block is pressurized, and it returns to the waterpump.

I am not sure but I don't think that the heater core is ever switched out of the loop. Normally a heater core always gets water, and the temp switch determines how much air is passing over the core.

I think a parallel setup would sacrifice heating capacity.
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