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Old 01-09-2013, 10:55 AM   #32
Registered User
Join Date: Dec 2012
Location: Battle Creek Mi
Posts: 25
My Ride: 2004 330i 6M OBM
Last night I bled system again with no heat still. However I found that the bottom of the ET cap has started to come apart. The bottom of the cap has deteriorated up to the first o-ring. I purchased a new cap and have it installed. I wish they had one i. Stock when i got tank and maybe I wouldn't be going though all this.
I am thinking that those pieces have gotten lodged in the heater core. My next question is what is the direction of flow from the ET? I would assume that the heater pulls from the bottom if the ET then returns to the middle/ upper hose that goes into the back side of the tank. I want to try to back flush the heater but I want to make sure I don't push the pieces deeper into the core.

Thanks again for all the comments and advise.
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