![]() The exclusively formulated antifreeze that BMW specifies & makes available through its dealerships' parts department is an ethylene glycol based, silicated OAT (organic acid technology) formula, which contains no nitrates or phosphates, and has been chemically designed to prevent excessive silicate drop out. Just in case the video didn't attached here is a link BMW's TECHDRIVE volume 3 Number 2, May 2006 "A publication for independent BMW service professionals":īMW is fairly liberal on coolant use, requiring only that all cooling systems be filled with a "reputable brand name ethylene glycol long term antifreeze having corrosion inhibitors that are compatible with aluminum radiators". This is my first BMW and thus far working on it and reading the forum has been very helpful. I'm going to look more into the coolant light but thought I would try and get some feedback. I attached a video but was wondering if anyone could tell me if this is just a release valve and if this is a common problem r a problem at all.(most related posts have "white smoke" coming from the back left of the engine) I'm assuming this is the same thing I've seen before. I had the radiator and extra tank replaced in the spring and haven't had any problems since although on occasion I have seen the white smoke going up hill but it's usually gone by the time I park and get a chance to look at it. The liquid coming out was odorless so I assume it was water in the form of steam. When I got there I popped the hood to find what I think is a release valve next to the coolant tank putting out pretty good bursts of steam. I was only a few blocks from home so I drove the rest of the way. As I came to a stop light I noticed the white smoke coming from under the hood. The temperature gauge never changed though. Driving home yesterday in the rain on a cool 50 degree day my coolant light started to flicker on and off.
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