Quote:
Originally Posted by onebluemcm
Do you think this procedure would be the same on a Z4M?
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I looked in TIS and I didn't realize that the //M
S54 engine does not have a electric water pump so there's no "vent" mode for the cooling system.
Here's the TIS procedure for venting the S54. You'll have to do this between the flushes.
Quote:
Originally Posted by BMWTIS
Open vent screw.
Perform filling operation slowly.
Close vent screw when bubble-free coolant emerges.
Top up coolant expansion tank up to maximum cold fill level.
Close expansion tank.
Run engine up to operating temperature until the thermostat opens.
Allow car to cool down until coolant temperature drops below 30C.
Open sealing cap on expansion tank slowly in order to gradually reduce residual pressure.
Top up coolant expansion tank up to maximum cold fill level.
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