E90Post
 


Coby Wheel
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > How much life left in my discs?



Reply
 
Thread Tools Search this Thread
      08-03-2010, 01:50 PM   #1
pjs
Colonel
pjs's Avatar
284
Rep
2,774
Posts

Drives: i8
Join Date: Oct 2008
Location: NORTH

iTrader: (1)

How much life left in my discs?

According to I-Drive my front pads have 4000 miles left so booked in at the end of the month for these and a microfilter.

From memory, I always seem to have got skanked/persuaded to get discs at the same time (except my last 330d which had magic brakes and seemed to go on for ever).

Just had a 'feel' and there is only a slight 'lip' on the edge of the discs. Previous owner did discs and pads at 23k, car now done 45k. Advice please.
Appreciate 0
      08-03-2010, 02:12 PM   #2
E92Fan
Moderator
E92Fan's Avatar
United Kingdom
334
Rep
5,493
Posts

Drives: .
Join Date: Aug 2007
Location: .

iTrader: (0)

Quote:
Originally Posted by pjs View Post
According to I-Drive my front pads have 4000 miles left so booked in at the end of the month for these and a microfilter.

From memory, I always seem to have got skanked/persuaded to get discs at the same time (except my last 330d which had magic brakes and seemed to go on for ever).

Just had a 'feel' and there is only a slight 'lip' on the edge of the discs. Previous owner did discs and pads at 23k, car now done 45k. Advice please.
Discs will last till the next pad change most probably! If there's only a slight lip you have nothing to worry about. The discs doesn't visually show signs of being beyond repair? No cracks or major score marks along the surface?

You'll be fine - they have only done 22k miles and you'll get at least 30-35k out of them, especially if a lot of your miles have been motorway based.
Appreciate 0
      08-03-2010, 02:14 PM   #3
pjs
Colonel
pjs's Avatar
284
Rep
2,774
Posts

Drives: i8
Join Date: Oct 2008
Location: NORTH

iTrader: (1)

Quote:
Originally Posted by E92Fan View Post
Discs will last till the next pad change most probably! If there's only a slight lip you have nothing to worry about. The discs doesn't visually show signs of being beyond repair? No cracks or major score marks along the surface?

You'll be fine - they have only done 22k miles and you'll get at least 30-35k out of them, especially if a lot of your miles have been motorway based.
Thanks Tony, no signs of any marks/cracks and yes, plenty gentle motorway miles
Appreciate 0
      08-03-2010, 02:16 PM   #4
F31-340i
Colonel
F31-340i's Avatar
United Kingdom
161
Rep
2,475
Posts

Drives: BMW 340i Touring
Join Date: Apr 2007
Location: ...

iTrader: (1)

Thje discs show what their min thickness on them usually - unless its so rusty you can no longer see.

BMW TIS tells you the thicknesses for each model, but I can't access mine anymore as I have a fast but pants 64bit laptop.

Measure with a vernier caliper (digital ones cheap on ebay, can also use their depth gauge to measure tyres & also pads without removing wheel). Use 2 coins against the flat bit of the disc to ensure you're not measuring the lip thickness (measure coins alone between caliper and zero it before measuring coins & disc, if that makes sense).
Appreciate 0
      08-03-2010, 04:08 PM   #5
m1bjr
LSD - No, you're not seeing things
m1bjr's Avatar
United Kingdom
73
Rep
3,302
Posts

Drives: Baby F36 Gran Coupe
Join Date: Mar 2010
Location: Plymouth UK

iTrader: (4)

FYI, fronts on the 335i
New=24mm
Min=22mm

I just replaced all mine with my usual supplier, Brakes International.
Had these on a few cars and always worked them hard on track with no issues.
Why pay more?

I bought a couple of cheap micrometers (Stanley) from eBay and they were decent quality for cheap parts and ideal for things like this too.
Appreciate 0
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 11:17 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST