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overcoil · 10-21-2014, 01:30 PM

With engine cool, I would remove pressure cap on cooling system and then run the engine for between 5-10 minutes - stationary - no driving - but it helps to have a breeze or air flow around the radiator grill area.
Maybe an air-pocket or bad cap

10-21-2014, 01:30 PM	#7
overcoil Major General 3073 Rep 5,577 Posts Drives: M235i 6spd Join Date: Dec 2013 Location: Mid-Atlantic iTrader: (0)	With engine cool, I would remove pressure cap on cooling system and then run the engine for between 5-10 minutes - stationary - no driving - but it helps to have a breeze or air flow around the radiator grill area. Maybe an air-pocket or bad cap
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