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Old 07-17-2013, 07:08 AM   #1
6th Gear Member
Join Date: Jan 2002
Location: Toronto
Posts: 6,088
Heater Hose Question, e30 318is

Can someone please verify the correct hose for inlet and outlet on the heater core?

If the arrows are correct in the first diagram then the water pipe is under suction and should be connected to the lower pipe on the heater core (without the valve). I assume the top pipe (with the valve) is the inlet to the heater core and the bottom pipe outlet, real OEM seems to have them reversed in the second diagram.

Really confusing! LOL
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