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      11-05-2012, 09:30 PM   #2
Casca
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Drives: E90 6MT
Join Date: May 2010
Location: California

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It's been a while, but I remember there was two parts to it. The outer shell of it was like a bolt and the inner was a phillips head type. I didn't think too hard when I went to drain the coolant and tried turning the bolt portion....and I heard a crack, like plastic breaking. But all seemed fine as it still seemed to stay on. Then I unscrewed it via the screw head inner portion to drain it. Put everything back together and it was fine for maybe 3 days. Eventually though, it fell out and I had to do roadside maintenance. Luckily I carry safety wire and I was able to safety wire that drain plug on, refill with water and continue driving till I got a new plug. If you tried turning the bolt outer portion, most likely you broke the clips and at that point that plug was just staying on because of friction.....which is not going to work for long.
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