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Horizontal Radiator - Water Flow Direction

J

JMcQueen

Limp Gawd
Joined
Sep 27, 2008
Messages
146
Im going to be mounting my radiator horizontally which results in the inlet/outlet being in a position of top or bottom rather than left or right if the radiator was mounted vertically.

My question is, which should be used for water flowing back into the radiator the top feed or the bottom one?
 
Most modern pumps are powerfull enough to eventually push all the bubbles out. I am a little confused by your description but in general, I do not think it would make a lot of difference with the concern being air trapped in the tanks that are usually built into the ends of the rad. Ease of routing the tubing and looks would be my primary concern as you can (and should) tilt the machine some while leak testing and bleeding the air out. All things being equal off the top of my head I think I would want the outlet at the top to help any trapped air get out easier but unless the rad was at the top of the loop even then it would not be a big deal.

More details, what rad, where is it mounted in the case etc. might help someone else come up with a good reason for one way or the other. I keep coming up with "in the long run it is not going to matter at all" but am not real happy with that answer.
 
as long as there is a reservoir between the radiator and the pump so that any air in the rad wont get sucked into the pump, i would agree with bill and say you are fine.
All things being equal off the top of my head I think I would want the outlet at the top to help any trapped air get out easier
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QFT, though if you dont have a choice, it really shouldnt matter.
 
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