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Old 12-15-2010, 10:49 PM   #35
iansanderson
Registered User
 
Join Date: Feb 2009
Location: Northeast Ohio
Posts: 2,778
My Ride: 2001 330CiC
well, the OP is basically stating the older BMW approved way of filling and venting (bleeding) the cooling system in an E46 which should work in the majority of situations.

but just so everyone knows, the only approved way of filling and venting our cooling system is with a specialized pressure-filling tool that BMW has developed and made available to the dealerships.

but, I digress.

I have had a 100% success rate working on many BMW's using the old approved method used on the M62 from the 5, 7 and X5 which can be seen below:

Bleeding cooling system and checking for water leaks
Warning! Danger of scalding!

Only perform this work after engine has cooled down.

Fill cooling system,

refer to 17 00 005.

Check cooling system for leaks,

refer to 17 00 009.

Open sealing cap. Set heater control to maximum temperature. Set blower to low level. This opens the heating valves and sets the auxiliary water pump in operation. Run engine and briefly press accelerator pedal three to four times (approx. 4500 to 5000 rpm) to flush engine cooling circuit. In doing so, do not run engine for longer than approx. 30 seconds; otherwise coolant will heat up and expand. If the coolant level drops in the expansion tank during this operation, top up expansion tank with coolant up to edge. Screw on sealing cap and warm up engine until thermostat opens.


Note:
The tank mark indicates the fluid level at approx. 20\~ C.
Use only recommended coolant,
refer to BMW Operating Fluids MG 17.
Black expansion tank
Allow engine to cool down before checking coolant level. Coolant temperature must not exceed 30\~ C. If ambient temperature exceeds 30\~ C, allow engine to cool down at least to ambient temperature.
Check coolant level, top up coolant if necessary until fluid level is in line with marking on expansion tank.
Note:
The tank mark indicates the fluid level at approx. 20\~ C.
Use only recommended coolant,
refer to BMW Operating Fluids MG 17.
__________________



Cheat Sheet:

GT1/ISIS/MoDiC = Factory authorized diagnostic system used by BMW dealerships across the world.

NCS Expert = BMW Factory R&D programming tool available on the internet (not intended for the public and not available to the dealership network)

OEM = Genuine BMW part only available from a franchised BMW dealership.

DME = Engine Management Computer
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