Help Please BMW Z3 Rear disks problem
Discussion
Hi
I am trying to change the rear disks on my Z3. They are not playing ball. I removed the calliper and carrier as well as the screw holding the disk to the hub.
However the disk would not come free and looked like it had never been replaced which is not a surprise as the car has relatively low mileage.
I have applied wd40 to try loosen things up and tried whacking it with a rubber mallet as well. It now will spin on the hub as you can put the car in gear and then rotate the disk but it still will not come off. If I give it a relatively decent whack it will move away from the hub around 2-3cms on one side but will not come free.
What am I missing here? Its really really odd. It feels almost like its on a spring.
Any help or advice much appreciated.
I am trying to change the rear disks on my Z3. They are not playing ball. I removed the calliper and carrier as well as the screw holding the disk to the hub.
However the disk would not come free and looked like it had never been replaced which is not a surprise as the car has relatively low mileage.
I have applied wd40 to try loosen things up and tried whacking it with a rubber mallet as well. It now will spin on the hub as you can put the car in gear and then rotate the disk but it still will not come off. If I give it a relatively decent whack it will move away from the hub around 2-3cms on one side but will not come free.
What am I missing here? Its really really odd. It feels almost like its on a spring.
Any help or advice much appreciated.
ts to remove. mark.c said:
Before you throw in the towel, did you back off the cables inside the car?
Que??Handbrake off. Disk freed up. Removed caliper and carrier. Turned little pins behind splashguard which promptly fell into the whole assembly. Managed to pull the disk far out enough that I could see the little wheel as in above pictures but could not figure out how to turn it or which way. Just not able to get enough torque on it.
Jakg said:
AFAIK the Z3 has the same or virtually identical rear brakes to a Rover 75 / MG ZT.
I replaced the rear discs on my ZT last weekend and came across a similar problem - one disc was being a right pain to remove.
I backed off the adjusters on the handbrake shoes through the holes in the hub for the wheel bolts but even then it was tough. I just backed it off, then kept rotating the disc and tapping with a hammer to loosen.
Having replaced my handbrake shoes the next weekend (I changed the disc to find I had a knackered handbrake shoe, which of course I didn't have spare!), I wouldn't recommend removing the retaining pins - but you've done it now so nevermind!
The handbrake on the Rover 75 / MG ZT is well known for being terrible and adjustment is quite common - to slacken the shoes you need to wind the adjuster in. The direction you need to turn it is "down" on my car, however on ZT / 75s at least it seems to be random down to how they were manufactured - some cars have both pointing the same way, others dont. If you adjust it one way and the disc stops moving - then you've probably adjusted it out to the disc. Wind it back in the other way and it will slacken off.
I hope some of this makes sense!
ThanksI replaced the rear discs on my ZT last weekend and came across a similar problem - one disc was being a right pain to remove.
I backed off the adjusters on the handbrake shoes through the holes in the hub for the wheel bolts but even then it was tough. I just backed it off, then kept rotating the disc and tapping with a hammer to loosen.
Having replaced my handbrake shoes the next weekend (I changed the disc to find I had a knackered handbrake shoe, which of course I didn't have spare!), I wouldn't recommend removing the retaining pins - but you've done it now so nevermind!
The handbrake on the Rover 75 / MG ZT is well known for being terrible and adjustment is quite common - to slacken the shoes you need to wind the adjuster in. The direction you need to turn it is "down" on my car, however on ZT / 75s at least it seems to be random down to how they were manufactured - some cars have both pointing the same way, others dont. If you adjust it one way and the disc stops moving - then you've probably adjusted it out to the disc. Wind it back in the other way and it will slacken off.
I hope some of this makes sense!
At this point the wheel has been on and off about 5 times so I have had enough it goes to my mechanic tomorrow and he can do it.
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