Quote:
Originally Posted by nukezero
Special thanks to edrive90 for his assistance. I like to add some instructions to performing this on a E92 335i with Sports package and 6MT.
You should remove the intercooler to get to the radiator drain plug. The intercooler is super easy to remove. Two T-20 or T-25 torx screw on each side. Then pull the quick-clamp from the charge pipes off. When the intercooler falls out, you will see a blue plastic screw on the driver's side. This screw is the radiator drain plug. Unscrew this to drain the radiator fluid.
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You dont have to completely remove the intercooler, just remove the torx bolts, that will give enough space to reach the drain without unhooking the charge pipes. A long screwdriver with a big head should be able to twist the plastic plug. I didnt have a big screwdriver, what i did is i stuck a penny upright at the en of a hex extention and thats how i unscrew the cap