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cooling system

  1. E39 M5 and E52 Z8 Discussion
    Hi all. This is the second summer I've been driving my M around and I wanted to toss around ideas for things to do that'll ensure the fickle cooling system on these things is working really well. What we know so far is the Cadillac option of replacing the radiator assembly with a Zionsville...
  2. E60 M5 and E61 M5 Touring Discussion
    I'm looking to do a flush and fill on my cooling system but haven't been able to find a DYI on the board. Is it really as simple as draining the radiator and refilling with a 50/50 mix of distilled water and BMW coolant? I've found DYI's for other model BMWs where there is a plug in the block...