brembo 18z brake upgrade project.
- Thread starter Charlie Farley
- Start date
Well in the cold light of day I have dry fitted the calipers to the discs and they all look to be right, 5mm gap between flat top of the bolt to the disc surface, disk is centre in the middle of the caliper.
In reality though this is not the case, the nut and bolt are pushed right into the disc and as such the disc cannot be tightened up flush.
Maybe it is the disk that is the problem , maybe the depth is too much which is why the disc is pushed right into the bolts, if it was a shallower top the gap would be larger.
In reality though this is not the case, the nut and bolt are pushed right into the disc and as such the disc cannot be tightened up flush.
Maybe it is the disk that is the problem , maybe the depth is too much which is why the disc is pushed right into the bolts, if it was a shallower top the gap would be larger.
Silly question and probably tricky to do but could you put a disc on with a washer under it on two of the bolts to see if that pulls the disc out far enough.....no need to have the pads in but just make sure the discs are centralised.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
yes that's doable carl but I've just found out the disks are not 345mm as the seller says, they are 350mm so i'm wondering wether that's a factor now.
I'm not on my pc at the moment but are they supposed to be 345mm or 350mm that for the ML. Fingers crossed they've sent the wrong discs and it can be sorted out easily.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
thanks for the contact info carl, those are the two numbers I managed to find last week , the land line is a dead line and the mobile doesn't accept incoming calls....
thanks for the input carl, much appreciated.
wow, plenty of data to munch on there carl.....not 100% sure what I should be looking for though..do you know what the right size disc need to be carl
so then carl , working on that data, the 350mm discs are 54.8 tall and the 345mm discs are 51mm tall , so according to my rocket calculations that's almost 4mm difference (3.8) to be exact, that maybe the problem then, 4mm is a fair bit when dealing with small tolerences, that would account for the disc being jammed onto the bolts/nuts.
I was going to carl then relised I didn't need to as it was on the specs sheet for the m-tech discs that I downloaded today.
Ahhh forgot you'd posted that up earlier......maybe they sent the wrong discs as they are for a different setup.....so there maybe someone else out there that's having the opposite dilemma to you.
Sent from my iPad using Tapatalk
Sent from my iPad using Tapatalk
I doubt it carl , I'm having soooooooooooooo much bad luck at the moment it bonkers, honestly carlm I could be in the middle of the amazon miles away from other human life form and still get hit by a meteorite..lol
Hahahaha......if it makes you feel better pal I've had bad guts for the past 36 hours so I've managed to get nothing done as I have to be in the immediate vicinity of the throne 
Sent from my iPad using Tapatalk
Sent from my iPad using Tapatalk
tony mc
Registered User
Rob mate sorry to hear your woe's, but stuff like this always happens to me, every thing i touch turns to sh#t when i start something, get that stiff upper lip on and march though it, send the disc back for the right ones and you'll be right mate, just a bit more waiting around thats all
tony mc
Registered User
the more I look into this whole disc thing the more I am convinced that the 350mm discs are the cause of the problem, everyone that's done the mod has gone with the 345discs.....maybe there is a good reason why, the 350's don't fit properly...
seems that the discs are wrong, what a surprise....I 've lost interest in the brake conversion now after this messup and I doubt that will be the end of the fitting issues either so probably selling the brembo's and send the kit back from where it came from.
Right then chaps, back on this subject again , I have a question that may sound so obvious but I wanted to be sure I wasn't being a bit thick and missing something relavant.
So the 320mm discs on my old bus at present have a centreing bore of 68mm dia , the discs I was supplied with needed spigot rings as they were a shade larger bore dia, now the ML 345 discs have a bore of 67mm , now its doesn't seem like rocket science that those discs will 1mm turned of the inner bore to allow them to fit onto the 68mm boss ....is this correct chaps , because if so the correct discs I need will still not fit on .....so the kit is not a ready to go item.
any thoughts chaps before I loose the plot now.
So the 320mm discs on my old bus at present have a centreing bore of 68mm dia , the discs I was supplied with needed spigot rings as they were a shade larger bore dia, now the ML 345 discs have a bore of 67mm , now its doesn't seem like rocket science that those discs will 1mm turned of the inner bore to allow them to fit onto the 68mm boss ....is this correct chaps , because if so the correct discs I need will still not fit on .....so the kit is not a ready to go item.
any thoughts chaps before I loose the plot now.
Is it not 0.5mm that needs taking off as this will equate to a total of 1mm.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
I have the ML55 if you want to try
I gave up, felt like a bodge, no sensors, wrong length bolts, spigots for brakes
I did the same and sold on and plumbed for AP
Just need the brackets now
Calipers are perfect and discs fit
I gave up, felt like a bodge, no sensors, wrong length bolts, spigots for brakes
I did the same and sold on and plumbed for AP
Just need the brackets now
Calipers are perfect and discs fit
Yes, you need to loose 1mm off the diameter from the ML disc. This is why I asked previously if the centre bore looked like it had been machined. I don't think I would be keen on using a spigot for the disc.
Assuming you have spoken to the company, what are they saying?
Return the lot and buy the right bits individually, cheaper that way too.
Jimbo d
Registered User
- Joined
- Oct 6, 2016
- Messages
- 104
- Reaction score
- 110
- Points
- 43
Just my 2 pence worth (old mans talk) surely if you bought a fitment kit it should do just that fit , there is something in sourcing your own parts with a bit of research i managed too ,only to find they didn't fit under wheels hence up for sale But it was a 3rd of the price .
thanks for the replies chaps.
Ajax, I thought you'd know the score, they have agreed to send me out the correct discs now, well correct in a loose description, but they are 67.0mm bore, which is a better option than going with mickey mouse spigot rings but still means that the kit is not just a straight fit as i'll need to get them turned down now .
Jase , the kit did come with all the bits and the bolts are not an issue now as the discs were wrong, all the rest was included.
Jimbo, you are correct chap in your reply, which is exacty my point really , the kit is advertised as all you need to do the conversion , with the correct parts, no suggestion that the discs will not fit directly without being machined down , so effectively the kit is not proper conversion kit , its just a collection of parts some that fit and some that don't, still not happy frankly.
Ajax, I thought you'd know the score, they have agreed to send me out the correct discs now, well correct in a loose description, but they are 67.0mm bore, which is a better option than going with mickey mouse spigot rings but still means that the kit is not just a straight fit as i'll need to get them turned down now .
Jase , the kit did come with all the bits and the bolts are not an issue now as the discs were wrong, all the rest was included.
Jimbo, you are correct chap in your reply, which is exacty my point really , the kit is advertised as all you need to do the conversion , with the correct parts, no suggestion that the discs will not fit directly without being machined down , so effectively the kit is not proper conversion kit , its just a collection of parts some that fit and some that don't, still not happy frankly.
Last edited:
Never looked into it Rob.....but new they are quite expensive.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
ok carl, looks like I should have just kept my original BBK , oh isn't hindsight a wonderfull thing..
I think this is the kit you want Rob CP5570-1002 @ around £2.5k and if you are never going to use them apart from a bit of bling to fill your wheels they would be a total waste of money.
Calipers are the easy bit second hand but then you have the rotors which will basically be the same as a set for an RS4 as you'd have to buy both bells and rotors and I'm not sure AP will sell the appropriate carrier on its own.
A phenomenal amount of stopping power which would be wasted as it would never be used unless you brake at the last second coming up to a junction.
Sent from my iPhone using Tapatalk
Calipers are the easy bit second hand but then you have the rotors which will basically be the same as a set for an RS4 as you'd have to buy both bells and rotors and I'm not sure AP will sell the appropriate carrier on its own.
A phenomenal amount of stopping power which would be wasted as it would never be used unless you brake at the last second coming up to a junction.
Sent from my iPhone using Tapatalk
Did we not all say things like you'll regret it!
The thing is though was your set up the same calipers you have now but with rotors and bells?
Sent from my iPhone using Tapatalk
