Does anyone know the torque specs for the bolts with a front brake caliper?
Senior Member
Joined: Jan 2018
Posts: 415
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From: Whitehouse Station, NJ
2012 C63 P31 Sedan
Just as an FYI, I found this guide for installing a set of Porsche calipers, which appear to be another off the shelf Brembo 6 piston unit very similar to ours. On page 14, they replace the caliper bracket with a custom one, and torque those hex socket cap screws to 80 ft. lbs.
http://bd8ba3c866c8cbc330ab-7b26c6f3...stallation.pdf
Seems about right given the size of the bolt, although I am going to use some blue loctite for good measure.
http://bd8ba3c866c8cbc330ab-7b26c6f3...stallation.pdf
Seems about right given the size of the bolt, although I am going to use some blue loctite for good measure.
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Joined: Jun 2008
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From: Los Angeles
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Nice find. Mine are still at 135ft/lbs with no problems, however I’ll definitely change those and use the 80 before my next event.
Member
Joined: Dec 2017
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GLE 63S
I broke one of those caliper to caliper bracket bolts by trying to torque to 130fl/lbs. Was a nightmare getting the broken piece out of the bracket. I then replaced all 4 bolts and the ones that didn't snap (I never did get them to 130ft/lbs) were visually stretched and on the verge of snapping as well.
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Joined: Sep 2016
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From: NY
2010 C63 2019 GLA45
I bought the Brembo GT system for my Subaru for the front, with 2 piece rotors.
In those instructions, Brembo only deals with the torque of nthe fasteners between the Brembo caliper and the Brembo bracket. The Brembo bracket lines up for the holes in the knuckle and the torque there and bolts are provided by the car's OEM.
Which is exactly reverse from what you guys are finding by looking at the OEM, they don't sell the Brembo bolts and probably don't offer the torque for these either.
In the case of my calipers, the Brembo bracket has holes for the knuckle and studs for the caliper. The torque for the caliper nuts is 80 ftlb and they're self locking.
In those instructions, Brembo only deals with the torque of nthe fasteners between the Brembo caliper and the Brembo bracket. The Brembo bracket lines up for the holes in the knuckle and the torque there and bolts are provided by the car's OEM.
Which is exactly reverse from what you guys are finding by looking at the OEM, they don't sell the Brembo bolts and probably don't offer the torque for these either.
In the case of my calipers, the Brembo bracket has holes for the knuckle and studs for the caliper. The torque for the caliper nuts is 80 ftlb and they're self locking.
Member
Joined: Dec 2017
Posts: 111
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GLE 63S
I bought the Brembo GT system for my Subaru for the front, with 2 piece rotors.
In those instructions, Brembo only deals with the torque of nthe fasteners between the Brembo caliper and the Brembo bracket. The Brembo bracket lines up for the holes in the knuckle and the torque there and bolts are provided by the car's OEM.
Which is exactly reverse from what you guys are finding by looking at the OEM, they don't sell the Brembo bolts and probably don't offer the torque for these either.
In the case of my calipers, the Brembo bracket has holes for the knuckle and studs for the caliper. The torque for the caliper nuts is 80 ftlb and they're self locking.
In those instructions, Brembo only deals with the torque of nthe fasteners between the Brembo caliper and the Brembo bracket. The Brembo bracket lines up for the holes in the knuckle and the torque there and bolts are provided by the car's OEM.
Which is exactly reverse from what you guys are finding by looking at the OEM, they don't sell the Brembo bolts and probably don't offer the torque for these either.
In the case of my calipers, the Brembo bracket has holes for the knuckle and studs for the caliper. The torque for the caliper nuts is 80 ftlb and they're self locking.
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Joined: Sep 2016
Posts: 1,175
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From: NY
2010 C63 2019 GLA45
Try Race Technologies, Brembo s largest North America distributor.
I will post a catalog that may help you ID the caliper in Brembo slang.
Then try to approach them with " I need a rebuild kit for the Type H caliper" by example.
In the Subaru world, Subaru sells the Brembo rebuild kit for the Brembo Sti calipers.
Those are not even Subaru branded, they're Brembo branded.
The rebuild kit, I think would include the bolts.
So you may need to reach to Mercedes of North America. It's an available resource.
If you navigate through the 1800 numbers you may get a tech exec in the end.
I called when I had my W124 and got a hold of one and yes he was very annoyed that he was being called about a W124.
I will post a catalog that may help you ID the caliper in Brembo slang.
Then try to approach them with " I need a rebuild kit for the Type H caliper" by example.
In the Subaru world, Subaru sells the Brembo rebuild kit for the Brembo Sti calipers.
Those are not even Subaru branded, they're Brembo branded.
The rebuild kit, I think would include the bolts.
So you may need to reach to Mercedes of North America. It's an available resource.
If you navigate through the 1800 numbers you may get a tech exec in the end.
I called when I had my W124 and got a hold of one and yes he was very annoyed that he was being called about a W124.
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Member
Joined: Dec 2017
Posts: 111
Likes: 36
GLE 63S
Try Race Technologies, Brembo s largest North America distributor.
I will post a catalog that may help you ID the caliper in Brembo slang.
Then try to approach them with " I need a rebuild kit for the Type H caliper" by example.
In the Subaru world, Subaru sells the Brembo rebuild kit for the Brembo Sti calipers.
Those are not even Subaru branded, they're Brembo branded.
The rebuild kit, I think would include the bolts.
So you may need to reach to Mercedes of North America. It's an available resource.
If you navigate through the 1800 numbers you may get a tech exec in the end.
I called when I had my W124 and got a hold of one and yes he was very annoyed that he was being called about a W124.
I will post a catalog that may help you ID the caliper in Brembo slang.
Then try to approach them with " I need a rebuild kit for the Type H caliper" by example.
In the Subaru world, Subaru sells the Brembo rebuild kit for the Brembo Sti calipers.
Those are not even Subaru branded, they're Brembo branded.
The rebuild kit, I think would include the bolts.
So you may need to reach to Mercedes of North America. It's an available resource.
If you navigate through the 1800 numbers you may get a tech exec in the end.
I called when I had my W124 and got a hold of one and yes he was very annoyed that he was being called about a W124.
Member
Joined: Dec 2017
Posts: 111
Likes: 36
GLE 63S
I still can’t understand why it’s so much easier to remove the caliper from the calipers support bar but Mercedes says to remove the support bolt to the steering column. I have a 292.375 and it clearly doesn’t not say for my model that I can remove this way using these hex bolts.
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Joined: Jun 2008
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From: Los Angeles
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Oh, I forgot. There’s a Mercedes part # for these bolts too. I know this because I have a bag with 8 of them. I’ll go look that up later today.
MBWorld Fanatic!
Joined: Sep 2016
Posts: 1,175
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From: NY
2010 C63 2019 GLA45
This is not a Mercedes AMG Brembo catalog.
Brembo has families of calipers.
They then propose a certain style for an application.
Then they customize some features to make it OEM, they make the bracket, to center it and position it for a car, change the piston diameters.
I'm not proposing a 100% turnkey solution here.
I'm presenting the (older) catalog, someone should look at all the calipers there, magnify and find in the 6 piston category, the caliper that best matches ours.
As an example, the caliper that Brembo sells in the Brembo GT kit for the 02 Subaru WRX, is the family A caliper.
This is known as the Lotus Caliper. They used it in the Esprit OEM, I think.
Since the objective is to get the bolt and they will not sell without buying the rebuild kit and you can tell in the CAD drawing what diameter and length bore the bolt goes into...
(I mean yeah, the piston seals in the rebuild kit may not match, but they're not the goal here)
Brembo has families of calipers.
They then propose a certain style for an application.
Then they customize some features to make it OEM, they make the bracket, to center it and position it for a car, change the piston diameters.
I'm not proposing a 100% turnkey solution here.
I'm presenting the (older) catalog, someone should look at all the calipers there, magnify and find in the 6 piston category, the caliper that best matches ours.
As an example, the caliper that Brembo sells in the Brembo GT kit for the 02 Subaru WRX, is the family A caliper.
This is known as the Lotus Caliper. They used it in the Esprit OEM, I think.
Since the objective is to get the bolt and they will not sell without buying the rebuild kit and you can tell in the CAD drawing what diameter and length bore the bolt goes into...
(I mean yeah, the piston seals in the rebuild kit may not match, but they're not the goal here)
MBWorld Fanatic!
Joined: Aug 2011
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From: Kitchener, ON
2010 C63 AMG
There is an explosion diagram page for our calipers listing every single part.
If you buy a Brembo branded part from the dealer, it usually comes with a large fold out leaflet. Not sure if it's available online though.
If you buy a Brembo branded part from the dealer, it usually comes with a large fold out leaflet. Not sure if it's available online though.
Senior Member
Joined: Jan 2018
Posts: 415
Likes: 109
From: Whitehouse Station, NJ
2012 C63 P31 Sedan
I wouldn't stress if you can't find the exact P/N. The one that BLKROKT posted should be fine. As long as it's a metric grade 12.9 with the right thread pitch and length, you will be using the strongest steel hardware available. Put some blue loctite as well.
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Joined: Sep 2014
Posts: 1,051
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From: LaLaLand
2015 GLK350 & 2020 C300
I bought both the Brembo and the Mercedes 0039907905 hardware for my new AMG calipers. I ended up liking the Mercedes bolts better because the self contained washer was thicker.
My calipers came with the Brembo booklet, I used the torque specs from that as advised. Unfortunately, me being useless as usual, I threw the booklet away 😅
My calipers came with the Brembo booklet, I used the torque specs from that as advised. Unfortunately, me being useless as usual, I threw the booklet away 😅
Member
Joined: Dec 2017
Posts: 111
Likes: 36
GLE 63S
Do you remember if the torque spec for those bolts was 80 ft lbs like the Porsche brakes posted a little earlier? I chatted with a MB Tech yesterday and he stated they don’t use those bolts but remove the entire caliper with the MB bolts. Can’t figure out why Brembo has those bolts to begin with if MB WIS states to take the entire caliper off.
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From: Los Angeles
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Hey guys, just a reminder. If you’ve ever touched these bolts (I’m talking about the big M12 caliper to caliper bracket bolts), do yourself a favor and look at them every once in a while.
My car is finally going back together after my disaster of a track day in March. I was inspecting my brakes before putting the wheels back on, and found one of these bolts had backed out about 1/8”. Scary! Took the bolt out, cleaned the threads, chased the hole, applied a little antiseize because I noticed some galvanic corrosion, and torqued to 90ft/lbs.
Don’t know if I missed torquing it down or what, but will keep a close watch on it. Gotta keep an eye on absolutely everything you modify because you never know.
My car is finally going back together after my disaster of a track day in March. I was inspecting my brakes before putting the wheels back on, and found one of these bolts had backed out about 1/8”. Scary! Took the bolt out, cleaned the threads, chased the hole, applied a little antiseize because I noticed some galvanic corrosion, and torqued to 90ft/lbs.
Don’t know if I missed torquing it down or what, but will keep a close watch on it. Gotta keep an eye on absolutely everything you modify because you never know.
Last edited by BLKROKT; Jul 8, 2021 at 04:01 PM.
Junior Member
Joined: Dec 2020
Posts: 26
Likes: 1
C63 AMG 507 Edition
Do you have the WIS for the rear brake rotor/calipers? I want to make sure I'm going by the correct torque spec for the rear calipers.
Thanks in advance!
