M2 Brake Line & Fluid Upgrade
After reading a ton of posts on BimmerPost about brake fluid and brake lines for getting the most out of the M2 on a race track I decided to swap out the OEM before my first track day.
There are tons of options for stainless steel brake lines.
For me the deciding factor came down to color. In addition to being highly rated the Turner Motorsport stainless brake lines come in a blue color that is a close match to my M2. This may seem like a silly way to make a decision but with plenty of great choices that are similar in cost, why not pick ones that look good with your car, even if no one may ever see them!
I found this video the most helpful when trying to learn how to change the lines and bleed the brakes in my M2.
It is never as easy as it looks on YouTube. Here are a couple of tips that the video doesn’t show:
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Spray each brake line connection and mounting clip with PB Blaster to help loosen them up.
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The clip is a pain to get out. I found that inserting a small flat head screw driver into the hole in the clip and prying up helped get it out.
- After the new line was in and I bled the fluid, I would test the brake pedal by pumping it a few times with my hand (since the car was on jacks) to make sure the travel was still firm. I repeated this after bleeding each brake.
Using a Power Bleeder made this an easy one man job. I added a full quart of Castrol SPF to the power bleeder and flushed the existing fluid out of the system. My fluid was new as the dealer serviced the system recently. If your brake fluid is used it easy to see the color change when the new fluid starts to bleed into the catch can. I used the empty SPF bottle to measure how much brake fluid I was pulling out at each corner to be sure I got new fluid in each line.
Once I was done and put the wheels back on I tested the brakes. First just letting the car roll in my garage, then down my driveway and finally around my neighborhood to make sure everything was in good working order before using the car at speed.
