Today I flushed the cooling system, the previous owner of my 97 M3 used green coolant, and I am also missing the aux "pusher fan". I got the blue stuff from BMW along with a new reservoir and upper and lower radiator hoses. When I was installing the hoses I found it easier to access the clamps with the K&N cone filter and elbow removed... After flushing the block and radiator with water and capping the system, I filled it up, bled the tank as described...lots of bubbles came out.... Added a little Water Wetter to the mix and seems to be working good. Only concern is that the O-ring on the the radiator cap on the inside threaded part came off and was resting on the new reservoir. it fell in the reservoir.....problem??? The main concern, when I assembled the system and began to add coolant/h20/waterwetter I ran the engine to open the thermostat to suck the coolant into the block while bleeding it. Only thing is that I left the elbow and the KN filter off while running the engine, and now the ASC light is on. I cant get it to turn off. This happened once before when I removed the filter for cleaning but I was able to tap on the injector terminals and disconnect/reconnect the battery and the light was of, unless turned on. Ever since running the engine w/o the filter and inducing new coolant the ASC light has been on on my dash, and the switch wont turn it off... Any help?

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: BMW 3-Series E36 Cooling System Flush

To clear the ASC fault, you will have to read out faults using a BMW scan tool. Address the problem that is setting the fault codes, then clear the fault codes using a BMW scan tool.

As far as the )-ring goes, I would fish it out so it doesn't end up lodged inthe cooling system somewhere.

- Nick