Bell come loose from disc after 8 month
#1
Bell come loose from disc after 8 month
New discs fitted 9 month ago,I had to get them made as I'm running the old scoobyclinic 6 pots(fronts).
I used new bolts and torqued them(10 bolts) to 5Nm cross pattern 1st then 10Nm to finish.
Car developed a rattle on the front so on investigating I found the o/s bell had come loose from the disc
Have I torqued them up to the wrong spec?
Should I be using thread lock?
Cheers
Rich
I used new bolts and torqued them(10 bolts) to 5Nm cross pattern 1st then 10Nm to finish.
Car developed a rattle on the front so on investigating I found the o/s bell had come loose from the disc
Have I torqued them up to the wrong spec?
Should I be using thread lock?
Cheers
Rich
#3
I've got no thread lock either lol plus I'm thinking it would be better to get some more new bolts.
I've tightened them all on both discs by hand as much as I dare so I'll get new bolts and some thread lock for next time I do a service and redo them.
#4
THE braking specialist
iTrader: (259)
If you have reused the old nuts , they will have lost the lock on them , they are deformed from new , so when you fit them they lock onto the bolt , they should not really be used again , we always supply new nuts and bolts with our rotors but we use a 6mm nut and bolt.
Pick up some new M4mm all metal locking nuts and it will fix it , you don't need thread lock
Cheers Ian
Pick up some new M4mm all metal locking nuts and it will fix it , you don't need thread lock
Cheers Ian
#7
What are my options here?
After 20 miles of driving the knocking is back so I can only assume the bolts have come loose again!
I didn't really want to use thread lock and they were bad enough to get off without that on,it may be my only option tho??
Are the threads on the captive nuts also deformed when new so they lock the bolts?
Would drilling out the captive nuts and putting in longer,thicker bolts with nuts be an option?
After 20 miles of driving the knocking is back so I can only assume the bolts have come loose again!
I didn't really want to use thread lock and they were bad enough to get off without that on,it may be my only option tho??
Are the threads on the captive nuts also deformed when new so they lock the bolts?
Would drilling out the captive nuts and putting in longer,thicker bolts with nuts be an option?
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#12
Scooby Regular
#13
Nice one,looks like I'll be using thread lock.
Just a bit gutted I wasn't told that the nuts were deformed from new which locked the bolts in,pretty dangerous as it is if I have to brake hard at speed!!!
#16
Scooby Regular
#17
THE braking specialist
iTrader: (259)
Cheers,not sure if I should risk drilling,I'm not really equipped to do a perfect job and get a perfect flat surface.
Nice one,looks like I'll be using thread lock.
Just a bit gutted I wasn't told that the nuts were deformed from new which locked the bolts in,pretty dangerous as it is if I have to brake hard at speed!!!
Nice one,looks like I'll be using thread lock.
Just a bit gutted I wasn't told that the nuts were deformed from new which locked the bolts in,pretty dangerous as it is if I have to brake hard at speed!!!
Cheers Ian
#18
Your set up doesn't have lock nuts from new , I remembered they have those inserts on the scoobyclinic discs , not nuts as on most other 2 piece discs , so yes you can use thread lock to put them in , just use one that can deal with the heat discs get up to
Cheers Ian
Cheers Ian
#21
So I have the discs off again,new bolts and thread lock ready.
Only problem is that I think I've spotted why the bells are coming loose so quickly!
I've added some pics,not the best but you will see my problem.
As Ian says these scoobyclinic discs use inserts,I've noticed that the inserts protrude past the metal on the rotor so I'm pretty sure it will never lock down properly?
Should the metal be thicker on this part of the rotor so the inserts sit flush or just below allowing the bolts to grip?
Only problem is that I think I've spotted why the bells are coming loose so quickly!
I've added some pics,not the best but you will see my problem.
As Ian says these scoobyclinic discs use inserts,I've noticed that the inserts protrude past the metal on the rotor so I'm pretty sure it will never lock down properly?
Should the metal be thicker on this part of the rotor so the inserts sit flush or just below allowing the bolts to grip?
#24
Scooby Regular
They look as if they should bolt up tight and not float.
Why not ask scoobyclinic ?? They may be able to supply the necessary drawings.
Why not ask scoobyclinic ?? They may be able to supply the necessary drawings.
#25
I have put everything back together now with new bolts and loctite in place,I'm hoping this works but am pretty doubtful.
As TECNOPUG says it might be ok allowing for heat expansion but why not manufacture the rotors so the inserts sit flush or bellow so the bolt grips initially?
If they come loose again then I will contact Ian to see what we can do.