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Message: <blockquote data-quote="jit3925" data-source="post: 611125" data-attributes="member: 24985">Yup, that's it. You have oil cooler prob bro.  But at least we were able to solve with a min damage to your wallet. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek!    :eek:" loading="lazy" data-shortname=":eek:" />I'm not sure about how to flush the polluted water out the engine but i don't think that you need to open the head cover.  The water circulates around the engine parts to keep the temperature at a nominal level, means its not circulating in the engine. Like the air around your skin, makes you feel hot or cold.  From my theory I think all you have to do is insert a pipe into the water inlet and keep pumping the water while the engine running to circulate the clean water, it will flush the polluted water out through the water outlet pipe. The outlet and inlet is connected to the radiator to circulate water through the cooling coil. So basically you insert clean water into the system with the outlet pipe disconnected to let the water out. Its like doing dialysis for diabetes patient at the hospital...hahahaha...About changing the ATF oil, BMW claims that you don't require to change it at all. Their idea of changing is replacing the whole gearbox with a new one when it breaks down. For all I know, many people recommend ATF oil change every 20k km. I made my service every 30k km with the BMW ATF. Go figure bro..</blockquote>

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