There are a few desent radiator flushes on the market. I believe prestone makes the most common one you can go the the parts store and pick up. Flushing radiators has however become almost a thing of the past. Most new cars are highly voltage sensitive and one should never consider putting tap water in as in the days or yore. I know this means little after you have build up. Whatever flush you use could in the end cause more headaches you will be knocking loose large chunks of deposits that most likly will block the radiaor or cause already weak seals to fail. Bmw's seem to have a frail cooling system as it is, if it were me I would overhaul the system while I had it apart, i.e. replace the water pump, the cooling connectors, the hoses and radiator. |