Proper coolant bleed procedure?

ferocity02 · 11-03-2014, 08:38 PM

I just replaced the water pump and thermostat and need to bleed my cooling system. I've been reading up on doing the automatic bleed procedure on my N54 E90 335i and have found conflicting information. Are the reservoir cap and bleeder screw supposed to be open or closed?

The rest of the procedure seems straightforward.

Thanks

mojobmw_e90 · 11-03-2014, 08:44 PM

Once filled,close all the holes.cap and blender screws prior to starting the automatic bleeding process

Efthreeoh · 11-04-2014, 05:08 AM

Both are supposed to be closed.

-Close cap
-Close bleed screw
-Turn on ignition - engine start w/o foot on clutch/brake
-Set HVAC to max temp (84)
-Set HVAC fan to lowest speed
-Hold gas pedal down for 10 seconds
-The WP will run for 12 minutes
-When finished, open cap and top off as necessary

11-03-2014, 08:38 PM	#1
ferocity02 Colonel 530 Rep 2,083 Posts Drives: 2013 135is Join Date: May 2014 Location: USA iTrader: (8)	Proper coolant bleed procedure? I just replaced the water pump and thermostat and need to bleed my cooling system. I've been reading up on doing the automatic bleed procedure on my N54 E90 335i and have found conflicting information. Are the reservoir cap and bleeder screw supposed to be open or closed? The rest of the procedure seems straightforward. Thanks __________________ 2013 135is DCT Carbon Black Metallic
	Appreciate 0 Tweet Quote

11-03-2014, 08:44 PM	#2
mojobmw_e90 Major 380 Rep 1,497 Posts Drives: 2014 E63S Join Date: Oct 2014 Location: Chicago IL iTrader: (3)	Once filled,close all the holes.cap and blender screws prior to starting the automatic bleeding process
	Appreciate 0 Quote

11-04-2014, 05:08 AM	#3
Efthreeoh General 17309 Rep 18,733 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	Both are supposed to be closed. -Close cap -Close bleed screw -Turn on ignition - engine start w/o foot on clutch/brake -Set HVAC to max temp (84) -Set HVAC fan to lowest speed -Hold gas pedal down for 10 seconds -The WP will run for 12 minutes -When finished, open cap and top off as necessary
	Appreciate 0 Quote