E46Fanatics - View Single Post - Top radiator hose
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Old 02-14-2020, 12:37 AM   #9
jmo69
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Join Date: Mar 2013
Location: Wisconsin
Posts: 5,859
My Ride: 03 325xi 98 328is
The system should be building enough pressure to vent through a stock 2.0 bar cap. Never vented with my 1.4 bar cap. Sounds like you need a new hose, you can get a Rein at Autozone, around here it's $48 or Amazon for $31 https://www.amazon.com/CRP-Automotiv...2003+BMW+325xi A friend just replaced his with that one. Has the system been bled properly or been over filled. Air in the system will compress but the coolant wont.
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Alternative to expensive xi control arm bushings
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Bad outer xi ball joint?
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