Rear brake disc opinions please

DMC63 · Post by **DMC63** » Tue Jul 17, 2018 9:11 pm

Car is in BMW and they've recommended putting new discs on the rear.

Heres the 'Health check' video they sent. The car wasn't jump started as the mechanic says, it was bump started.

My question is, Do you think the rear discs need changing? I'll be doing this myself if they do

https://video.citnow.com/vtXJ8S4fM0C

parabolica · Post by **parabolica** » Tue Jul 17, 2018 9:24 pm

I would say so; mine were in similar shape when I bought my car a few months ago. New discs, pads and handbrake shoes; easy enough job however the hex bolt was rusted and we had to drill the head off to the shoulder then put some elbow into getting the disc off the hub. Easy job after that.

ETA worth to start budgeting for some new rear tyres too

Scooba_Steve · Post by **Scooba_Steve** » Tue Jul 17, 2018 9:26 pm

Quite a lip, measure to be sure but worth doing.

maxman · Post by **maxman** » Tue Jul 17, 2018 9:34 pm

I did mine last year,similar to yours,handbrake shoes were ok so i did not change.

DMC63 · Post by **DMC63** » Tue Jul 17, 2018 9:43 pm

Thanks guys. I think I'm going to bite the bullet and do them along with the handbrake shoes.
I'm thinking of moving over to non-runflats. A rear runflat tyre cost me £275 about 18 months ago.
I'll start another thread for the tyres..

wonkydonkey · Post by **wonkydonkey** » Tue Jul 17, 2018 10:08 pm

Citing corrosion on the inner and outer edges of the discs as a reason to replace them?? Scaremongering much? Discs have a minimum thickness. If you want to charge over £100 per hour, Mr Dealership, how about you report the disc thicknesses

I replaced my rear discs and pads a couple of weeks back. £55 for all Mintex items. I've just bought Mintex discs and pads for the front end too - £55 again. Rude not to at those prices

DMC63 · Post by **DMC63** » Wed Jul 18, 2018 1:34 pm

wonkydonkey wrote: ↑Tue Jul 17, 2018 10:08 pm Citing corrosion on the inner and outer edges of the discs as a reason to replace them?? Scaremongering much? Discs have a minimum thickness. If you want to charge over £100 per hour, Mr Dealership, how about you report the disc thicknesses

I replaced my rear discs and pads a couple of weeks back. £55 for all Mintex items. I've just bought Mintex discs and pads for the front end too - £55 again. Rude not to at those prices

Good point on reporting disc thicknesses..
I've always replaced parts on the car with OEM, probably down to OCD, lol. For both rear discs, pads, shoes and sensor £165 from BMW. Will get this ordered and the job done next week sometime. Rear tyre first...£OUCH£

kis · Post by **kis** » Wed Jul 18, 2018 3:04 pm

DMC63 wrote: ↑Wed Jul 18, 2018 1:34 pm Rear tyre first...£OUCH£

Should be tyres. Good practice to replace in sets, particularly so if you drive more spiritedly.

Regarding discs, as mentioned they have minimum thicknesses. You've got plenty of pad left. Run to minimum disc thickness and then replace. Just like tyres, you wouldn't replace at 3/4mm when limit is 1.6mm

DMC63 · Post by **DMC63** » Thu Jul 19, 2018 10:20 am

kis wrote: ↑Wed Jul 18, 2018 3:04 pm
DMC63 wrote: ↑Wed Jul 18, 2018 1:34 pm Rear tyre first...£OUCH£
Should be tyres. Good practice to replace in sets, particularly so if you drive more spiritedly.

Regarding discs, as mentioned they have minimum thicknesses. You've got plenty of pad left. Run to minimum disc thickness and then replace. Just like tyres, you wouldn't replace at 3/4mm when limit is 1.6mm

Fair comment...What's the disc minimum thickness?

DMC63 · Post by **DMC63** » Thu Jul 19, 2018 12:17 pm

I'm going to buy the kit while I have the cash and change it all when the pads have worn down.

wonkydonkey · Post by **wonkydonkey** » Thu Jul 19, 2018 1:08 pm

DMC63 wrote: ↑Thu Jul 19, 2018 10:20 amFair comment...What's the disc minimum thickness?

Minimum thickness is stamped into the disc. It should be on the external face of the handbrake bell.

DMC63 · Post by **DMC63** » Sat Jul 21, 2018 11:01 am

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