Bleeding the cooling system
There are two methods of cooling system bleeding that are generally accepted. The first being the "BMW/Bentley Manual" version and the second is the "Jim Cash" version.
I recommend using the former to begin with and if you still end up with problems, you may want to try the latter version. Be aware that the Cash bleed procedure involves some steps that require you to run/warm up the engine. This means the coolant can be very hot, so, if you try this version, use caution when opening the bleed valve.
BMW/Bentley version with embellishment and video by NNY528I.
Jim Cash version.
Originally Posted by NNY528I
(Special thanks to NNY528I and cnn for their help.)
Originally Posted by jamesdc4
Last edited by jamesdc4; 08-03-2010 at 01:33 PM.
bleeder valve/screw 2000 540i
Does the 540i have a bleeder valve, other then the one on top of the expansion tank?
I'm confused, this may be a stupid question. In order to get the coolant to rise to the level of the thermostat bleeder I have to massively overfill the reservoir thus turning it from an expansion tank to a pressurised vessel waiting to pop. How do you get the coolant to bleed without overfilling it?
You have to turn the key to the ON position but do not turn on the car. Once you do that turn the knob on the center of the dash were the two air vent are from blue to red. Then put the temperature on both sides to high. This will kick in the secondary pump that will create coolant flow. That is when you can bleed the system from the bleeder screws.
Originally Posted by dontknow17
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