Track Pads on Large M2C brakes

Ratcher · 02-14-2023, 05:19 AM

Quote:

Originally Posted by NathObeaN

According to BMW docs, you are not supposed to remove the top bolt, at all. It’s not designed to be removed. That said, I accidentally did (before I read the instructions - RTFM!). I just got a fresh bolt, made very sure it was aligned correctly and applied some loctitite and torqued it as per Porsche/Brembo specs (they list the bolt info, BMW don’t) and haven’t touched it since.

From now on, I only touch the backside bolt. And yes, it’s ‘supposed’ to be single use. I tend to approach it as ‘single event’. So, remove bolt, change to track pads, re torque ‘old’ bolt, take to track, remove ‘old’ bolt second time, change back to street pads, apply new bolt. That’s just my view. Others may see that as too cautious or not cautious enough.

This comment could come from me

Have done a BUNCH of trackdays since and never ever had the slightest issue.

MooMooM2 · 02-14-2023, 06:34 AM

I wonder how many people take their cars to a shop who does the pads change wrong and drive around like that for years.

Maynard · 02-14-2023, 07:55 AM

Quote:

Originally Posted by medphysdave

That's not a bad plan. Do you have a link to the pads? I couldn't find them, but maybe because I'm using my phone to look for them.

I meant for the caliper bolts. I don't think they stock Ferodo pads other than the 2500 (that's what I'm running). Pricing on those 1.11's is soooo good that it does make me wonder (is there tax/duty added?).

Ratcher · 02-14-2023, 08:24 AM

Quote:

Originally Posted by MooMooM2

I wonder how many people take their cars to a shop who does the pads change wrong and drive around like that for years.

I personally know a great shop that always changes the pads on these cars by removing the bolts you aren't meant to use. And also there no problems.

MooMooM2 · 02-14-2023, 09:21 AM

Quote:

Originally Posted by Maynard

I meant for the caliper bolts. I don't think they stock Ferodo pads other than the 2500 (that's what I'm running). Pricing on those 1.11's is soooo good that it does make me wonder (is there tax/duty added?).

I have bought a bunch of stuff from the UK (and unless it has changed, I doubt it) if you stay under $800 then you won't have to pay any customs.

Quote:

Originally Posted by Ratcher

I personally know a great shop that always changes the pads on these cars by removing the bolts you aren't meant to use. And also there no problems.

I am not surprised, they look at the brake kit and do the "obvious" thing. I can't see mechanics that have never changed pads on these going to go read the manual when it looks pretty clear on what to do.

I am going to do a pad change soon and will buy bolts at FCP euro and then just keep returning them, thats a good idea.

And yeah FCP euro does not have any track pads, they only carry 2500

DrChase · 02-14-2023, 10:21 AM

If running stock suspension and tires no more aggressive than 200TW, then DS1.11 in front and DS2500 in the rear (even on a square tire setup) is a sweet spot. If your setup is more optimized for mechanical and tire grip, then you might consider DSUNO or DS3.12 in front and DS1.11 or DS2500 in the rear. It's surprising how difficult it is to underbrake the rear. Stock pads in the rear can be run with an aggressive front pad without much issue, especially with streetable tires and stock suspension.

keylime503 · 02-14-2023, 03:53 PM

Quote:

Originally Posted by NathObeaN

According to BMW docs, you are not supposed to remove the top bolt, at all. It’s not designed to be removed. That said, I accidentally did (before I read the instructions - RTFM!). I just got a fresh bolt, made very sure it was aligned correctly and applied some loctitite and torqued it as per Porsche/Brembo specs (they list the bolt info, BMW don’t) and haven’t touched it since.

From now on, I only touch the backside bolt. And yes, it’s ‘supposed’ to be single use. I tend to approach it as ‘single event’. So, remove bolt, change to track pads, re torque ‘old’ bolt, take to track, remove ‘old’ bolt second time, change back to street pads, apply new bolt. That’s just my view. Others may see that as too cautious or not cautious enough.

How do you replace the front pads on the 2NH brake calipers without removing the bolts that allow you to take the caliper off the brake disc?

MooMooM2 · 02-14-2023, 04:56 PM

Quote:

Originally Posted by keylime503

How do you replace the front pads on the 2NH brake calipers without removing the bolts that allow you to take the caliper off the brake disc?

even the incorrect way todo it you still have to remove the caliper off.

keylime503 · 02-14-2023, 06:01 PM

Quote:

Originally Posted by MooMooM2

even the incorrect way todo it you still have to remove the caliper off.

When I changed my front pads on the M2C I don't remember seeing more than one set of bolts that could be removed (maybe I'm just not remembering it). There were two bolts that screwed the caliper on which faced towards the inside of the wheel well. Were those the "right" bolts or the "wrong" bolts?

medphysdave · 02-14-2023, 06:56 PM

Quote:

Originally Posted by keylime503

When I changed my front pads on the M2C I don't remember seeing more than one set of bolts that could be removed (maybe I'm just not remembering it). There were two bolts that screwed the caliper on which faced towards the inside of the wheel well. Were those the "right" bolts or the "wrong" bolts?

Technically those are the wrong bolts. I say technically because there is BMW literature that says to never remove these, but many use them with no issues. There are bolts at the back of the caliper that connect the caliper bracket to the hub. Supposed to use those.

keylime503 · 02-14-2023, 07:39 PM

Quote:

Originally Posted by medphysdave

Technically those are the wrong bolts. I say technically because there is BMW literature that says to never remove these, but many use them with no issues. There are bolts at the back of the caliper that connect the caliper bracket to the hub. Supposed to use those.

When you say "back" of the caliper do you mean the side that faces towards the inside of the car? Because that's the side I'm talking about.

medphysdave · 02-14-2023, 07:42 PM

Quote:

Originally Posted by keylime503

When you say "back" of the caliper do you mean the side that faces towards the inside of the car? Because that's the side I'm talking about.

Yes, I think we are talking about the same side. Most seem to remove the top two bolts.

keylime503 · 02-14-2023, 07:51 PM

Quote:

Originally Posted by medphysdave

Yes, I think we are talking about the same side. Most seem to remove the top two bolts.

Ah, ok. I didn't even see two bolts on the top. Something to look for next time!

DrChase · 02-15-2023, 01:12 AM

Quote:

Originally Posted by Maynard

I meant for the caliper bolts. I don't think they stock Ferodo pads other than the 2500 (that's what I'm running). Pricing on those 1.11's is soooo good that it does make me wonder (is there tax/duty added?).

Demon Tweeks has awesome pricing on Ferodos. I bought DS2500 and DS1.11 for my M2C and my Evora. It’s a UK shop. They sell out quick, but are constantly getting new inventory, so it’s not much of a wait, especially considering they’re international and at least a hundred bucks cheaper than everywhere else.

Maynard · 02-16-2023, 07:05 AM

Quote:

Originally Posted by keylime503

When I changed my front pads on the M2C I don't remember seeing more than one set of bolts that could be removed (maybe I'm just not remembering it). There were two bolts that screwed the caliper on which faced towards the inside of the wheel well. Were those the "right" bolts or the "wrong" bolts?

This person has pictures that show how they should be removed. If you take the caliper off that silver bracket you are doing it incorrectly.

https://f87.bimmerpost.com/forums/sh....php?t=1951738

keylime503 · 02-16-2023, 12:17 PM

Quote:

Originally Posted by Maynard

This person has pictures that show how they should be removed. If you take the caliper off that silver bracket you are doing it incorrectly.

https://f87.bimmerpost.com/forums/sh....php?t=1951738

I don't even see how you would remove the caliper from the silver bracket so I guess I'm good

Maynard · 02-16-2023, 03:49 PM

If you scroll down thru those pics to the side views, you can see these 2 black Allen heads that are the connections (behind the pad with "made in italy"). When it is on the car, it looks much more intuitive to remove those.

keylime503 · 02-21-2023, 03:03 PM

Quote:

Originally Posted by Maynard

If you scroll down thru those pics to the side views, you can see these 2 black Allen heads that are the connections (behind the pad with "made in italy"). When it is on the car, it looks much more intuitive to remove those.

Thanks, this helped a lot. I never even noticed those two black allen heads.

02-14-2023, 06:34 AM	#46
MooMooM2 Lieutenant Colonel 1845 Rep 1,614 Posts Drives: M2 Comp Join Date: Apr 2021 Location: NY iTrader: (2)	I wonder how many people take their cars to a shop who does the pads change wrong and drive around like that for years.
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02-14-2023, 10:21 AM	#50
DrChase Private First Class 139 Rep 173 Posts Drives: BMW M2 Competition Join Date: Jul 2021 Location: Orange County iTrader: (0)	If running stock suspension and tires no more aggressive than 200TW, then DS1.11 in front and DS2500 in the rear (even on a square tire setup) is a sweet spot. If your setup is more optimized for mechanical and tire grip, then you might consider DSUNO or DS3.12 in front and DS1.11 or DS2500 in the rear. It's surprising how difficult it is to underbrake the rear. Stock pads in the rear can be run with an aggressive front pad without much issue, especially with streetable tires and stock suspension.
	Appreciate 0 Quote

02-16-2023, 03:49 PM	#61
Maynard Colonel 3862 Rep 2,882 Posts Drives: 228iX & M2C Join Date: Mar 2016 Location: Upstate NY iTrader: (1)	If you scroll down thru those pics to the side views, you can see these 2 black Allen heads that are the connections (behind the pad with "made in italy"). When it is on the car, it looks much more intuitive to remove those.
	Appreciate 1 keylime503629.50 Quote