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Old 10-26-2011, 08:22 AM   #19
pearce
Registered User
 
Join Date: Oct 2011
Location: Taiwan
Posts: 1
My Ride: E46 M3 Convertible
I got same problem 2 years ago, I have another solution "Bottom-up".

I did it when my car jacked up at a wheel shop.
1. open top in half way
2. pour some water at upper drain hole
3. find where the water drain out, it is around the rear wheel housing.
4. use compress air gun to blow the hose from bottom. clogged dirt will be blowed from upper drain hole.

ps. if you car is very low near ground, maybe you need to jack up your car firstly.

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