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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 11-02-2010, 01:49 PM
rwrice rwrice is offline
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Location: Southern California
 
Join Date: Aug 2005
Posts: 29
Mein Auto: 2006 325i
Cooling System air bleed procedure

Had an issue that was cleared when a wire to the temp sensor was repaired but the troubleshooting procedure that the tech performed included bleeding the air from the system. The procedure was explained to me so I am passing it on, hope its of value.

Open the hood and remove the radiator cap
Key fob inserted, no brake pedal, press Start
Driver and Pass air temp controls all the way to max temp
Press the defrost button to turn it on
Manually adjust the fan speed to the slowest setting (not off)
then hold the gas pedal down all the way for 10 seconds.

The water pump will begin to pump water slowly at first and faster within a few seconds
The water will squirt from a very small opening just under the cap threads in the reservoir
If there was any air in the system, this will purge it and will show you that the pump is operational as well.
I had to put the cap back on after about 15 seconds as it started to splash out from the force.

This should work on any electric powered water pump cars according to the tech
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  #2  
Old 11-02-2010, 02:27 PM
Bcube's Avatar
Bcube Bcube is offline
Combat Commuter
Location: Valley of the Dirt People, SoCal
 
Join Date: Apr 2007
Posts: 1,973
Mein Auto: 2007 E93 335i
Pretty good memory. Except the cap and bleed screw are closed. Here is the procedure.

Quote:
Adding coolant:
Note:
Open vent screw (1).
Fill coolant expansion tank up to lower edge of filler neck with
recommended coolant.
Observe mixture ratio.
Close bleed screw (1).
Close cap on expansion tank.
Quote:

Only when venting!

Note:
Do not open the coolant expansion tank cap during the venting
procedure.
1. Connect battery charger.
2. Switch on ignition.
3. Set heater to maximum temperature and turn fan down to
lowest speed.
4. Press accelerator pedal for 10 seconds to floor. Engine
must not be started.
5. The venting procedure is started when the accelerator pedal is
pressed and takes approx. 12 minutes.(Electric coolant pump
was activated and shuts down automatically after approx.
12 minutes).
6. Then top up fill level in coolant expansion tank with 100 ml
above max (see illustration).
7. Check cooling system for leaks.
8. If venting has to be carried out again (e.g. if cooling system is
leaking), allow DME to fall completely (leave ignition key
removed for approx. 3 minutes), then repeat from Point 3.
__________________
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"Used cars are our entry cars." - Luca di Montezemolo

Last edited by Bcube; 11-02-2010 at 02:29 PM.
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  #3  
Old 11-16-2011, 06:30 PM
Ricardo567 Ricardo567 is offline
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Location: U.S
 
Join Date: Mar 2010
Posts: 28
Mein Auto: BMW 1994 325IC
DIY: How to add & bleed a Coolant for BMW E46/E39 3 Series 2000-2006


Last edited by Ricardo567; 11-16-2011 at 06:32 PM.
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  #4  
Old 09-16-2014, 06:05 PM
Ricardo567 Ricardo567 is offline
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Location: U.S
 
Join Date: Mar 2010
Posts: 28
Mein Auto: BMW 1994 325IC
Thanks Kyshhhagsa,

It feel good when someone gave me very good comment.
You have a great day.
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