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      11-20-2009, 08:14 PM   #11
AlanAZ's Avatar
Drives: E90 325i sport manual
Join Date: Aug 2009
Location: Scottsdale, AZ

Posts: 798
iTrader: (4)

Bentley recommends replacing the O-ring on the drain plug, which is not listed a separate part. I just replaced the entire plug, they are just a few dollars. Torque to 22in-lb.

Also, BMW warns not to subject the pump to straight coolant, it must be mixed with water outside the engine.

For service in Arizona, I went to 60/40 water/coolant with 1 bottle Redline water wetter.
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