Quote:
Originally Posted by mojobmw_e90
Small pipe running over the radiator. Replace it with a metal brake line. Won't have to worry about it ever again
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Quote:
Originally Posted by Wolf 335
This is either radiator itself or the vent hose that arhoads335i already mentioned (Part#: 17127565094)
Replace that hose and also replace the upper rad hose (Par #: 17127540127) that the vent hose connects into. Have the upper rad hose ready because the nipple can break off as it gets brittle over the years.
Don't forget you'll need a hose clamp where vent hose connects to upper rad hose and at the coolant tank, as it is crimped from the factory.
Also, update your car info under your user on the left so we know what year, chassis and model it is.
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OP, pay attention to these posts. The spray pattern appears to be coming from the cross-over line and it's radiating outward due to wind and fan pushing it toward driver side.