[faustus89]

Hi friends,

I am fairly new to the track life and after hours of struggling, was able to change my pads (yeah for learning!).

The race pads I purchased are Pagid RSL29. When not using it on the track, would changing them out for the stock pads for daily use negatively affect anything like the rotors?

As a follow-up, I did change them out, would I need to set the brakes after each time I swap it (considering there isn't any issues with swapping them)?

Thank you for your help!

[FaRKle!]

No issues swapping back and forth. I typically try to bed the track pads after wearing off the street pad transfer layer, but don't really bother trying to bed the street pads when they go back in.

[faustus89]

Originally Posted by FaRKle!

No issues swapping back and forth. I typically try to bed the track pads after wearing off the street pad transfer layer, but don't really bother trying to bed the street pads when they go back in.

Thank you so much! Super helpful.

[Wolfman’s Brother]

I swap between stocks and PFC08 pads after a track weekend without issue.

No material buildup, or adverse effects beyond driving into the office on Friday on endurance pads that squeal like a stuck pig.

Stock brake system with pads & fluid is very good.

[Maynard]

Are you in an OG M2 or the M2C? M2C bolts that hold the front caliper are one-time use so be sure to replace with each swap.

[AKD]

Originally Posted by Maynard

Are you in an OG M2 or the M2C? M2C bolts that hold the front caliper are one-time use so be sure to replace with each swap.

Wait for real? I’ve been using the same ones (the bolts on the backside of the caliper) and then re-torquing to spec. The DIY vids I’ve used never mention that they’re one time use.

[Xeon555]

Technically they are 1 time use but you can get away with using them more then once

[Maynard]

You can get away with playing Russian Roulette too, and when it comes to brake parts this is an appropriate comparison. ESPECIALLY since OP is tracking the car, it would be nuts to take the risk. Save the penny-pinching for those chinese CF spoilers - new caliper bolts aren't an expensive item (and fcp Euro makes it a one-time purchase).

[AKD]

Seems a bit excessive to me considering we don’t replace any other parts (retaining clip, pins, etc) whenever the calipers come off. They aren’t torque to yield so I don’t know why they’d need to be replaced each time. The BMW TIS says to “renew OR replace” the bolts which usually means clean and replace only if necessary. I’ve tracked my m2, m3 and s2000 plenty without replacing the caliper bolts unless they didn’t pass visual inspection, and many of those days were 100F+

That said, maybe I’m just a lucky SOB that hasn’t angered the brake gods enough. I might start replacing after each season or go the FCP euro route and have a steady exchange program. Anyone have the part number handy? Doesn’t show up ECS or FCP when filtering by car.

[Maynard]

IIRC these ARE torque-to-yield, with a torque value plus x-degrees (don't have it handy though, would be listed in TIS if you have that info to share?). This is what I ordered from FCP: BMW Brake Caliper Carrier Mounting Bolt - Genuine BMW 34106864424 About $7 per and you need 4.

[AKD]

Originally Posted by Maynard

IIRC these ARE torque-to-yield, with a torque value plus x-degrees (don't have it handy though, would be listed in TIS if you have that info to share?). This is what I ordered from FCP: BMW Brake Caliper Carrier Mounting Bolt - Genuine BMW 34106864424 About $7 per and you need 4.

So now I'm truly lost. The bolts I'm referring to connect the caliper to the knuckle and they're on the backside of the caliper. You pretty much need to be directly under the brakes to remove and retorque them. They are 18mm standard bolts and the TIS (which is now behind a stupid BMW paywall) calls for 101nm and nothing else.

I know there are bolts on the side of the caliper connected to the carrier but BMW does not provide a torque spec for those and does not call for their removal when swapping pads.

This video does a good job demonstrating the BMW TIS procedure:

[Maynard]

Originally Posted by AKD

So now I'm truly lost. The bolts I'm referring to connect the caliper to the knuckle and they're on the backside of the caliper. ...
This video does a good job demonstrating the BMW TIS procedure:

Thanks for posting this vid. I'm realizing I've got it mixed up a bit. The front bolts that I was told are single use are the ones circled at c. 4:45. I think I got it mixed up with the rear caliper bolts that are torque-to-yield (30NM + 90 degrees). TIS shows these as identical bolts/torques so I assumed both should be replaced (TIS does list it as a 'renew screw'). I figure that for $15 per side it is worth it when time to change pads. And if you really miss TIS PM me.