| Author |
Message |
|
samfieldhouse
Firing on two.
Joined: February 11th, 2009, 12:32 am
Posts: 3324
Location: Chichester, West Sussex
|
 When to replace brake disks? How do you know when to replace them? I guess the obvious answer is 'when braking performance is poor' however I have no comparison. The disks have done at least 60,000 miles (they haven't been changed in my ownership) and there is a noticeable groove in the disk where the pads grip it. She does, however stop fine and received no advisories on it at the last MoT.
Advice/thoughts appreciated.
|
| February 4th, 2012, 7:14 pm |
|
|
|
knightley
Firing on two.
Joined: June 19th, 2010, 8:40 pm
Posts: 761
Location: Kingswood, S.Glos.
|
Re: When to replace brake disks? Most manufacturers specify a minimum thickness for brake discs. I'd follow that advice.
Just checked. 4mm. minimum thickness. 0.2mm. run-out.
_________________
John Jordan
It is a truth universally acknowledged, that a single man in possession of a good fortune must be in want of a d'olly.
|
| February 4th, 2012, 7:25 pm |
|
|
|
J-dub
Aircooled Idiot
Joined: April 24th, 2010, 10:01 am
Posts: 5733
Location: Location Location
|
Re: When to replace brake disks? Isn't it also when there rusted to hell or scored badly?
_________________
1988 2cv 652cc
1993 Toyota Hilux Surf 3000cc runs on Bio Diesel
2004 Toyota Landcruiser Amazon 4200cc runs on Bio Diesel
1998 Daihatsu Hijet 1300cc
2005 Susuki Bandit 650cc
|
| February 4th, 2012, 7:54 pm |
|
|
|
2CViking
viking bastard
Joined: April 18th, 2009, 11:43 am
Posts: 2424
Location: Meneac, Bretagne France
|
Re: When to replace brake disks? The risk is cracking the disc. Seen it a few times, one flying disc removed the caliper from the gear box and became a very expensive repair. Also the risk of loosing all brakes is scary. Replace when the micrometer is reading 4.5 mm
You do not have the required permissions to view the files attached to this post.
_________________
|
| February 4th, 2012, 8:03 pm |
|
|
|
Devils Advocate
Firing on two.
Joined: July 26th, 2009, 3:36 pm
Posts: 1019
|
Re: When to replace brake disks? Blimey - I guess being the recommended min thickness it will be safe, but 4mm strikes me as being scarily thin 
|
| February 6th, 2012, 11:33 am |
|
|
|
2CViking
viking bastard
Joined: April 18th, 2009, 11:43 am
Posts: 2424
Location: Meneac, Bretagne France
|
Re: When to replace brake disks? Devils Advocate wrote: Blimey - I guess being the recommended min thickness it will be safe, but 4mm strikes me as being scarily thin That is Citroens minimum. All new none Citroen disc have 5 mm stamped on as minimum.
_________________
|
| February 6th, 2012, 12:05 pm |
|
|
|
Sean
Firing on two.
Joined: April 22nd, 2009, 11:06 pm
Posts: 3684
Location: Ecosse
|
Re: When to replace brake disks? given that they come up cheaply on fleabay ill stick new ones on at the drop of a hat, last bunch all used up now so ill have to keep an eye open.
Sean
_________________
Kissing the Lash
"Any advice of a technical nature is given on the understanding that I've actually done this shit, not just read about it in D*lly club mag some time ago.
|
| February 6th, 2012, 12:28 pm |
|
|
|
Jonathan
Firing on two.
Joined: January 1st, 2009, 7:37 pm
Posts: 4708
Location: Disunited Kingdom
|
Re: When to replace brake disks? The discs on my 2CV have done at least 143,000 miles and there's not much wear (though a previous set of pads lasted over 60,000 and were only replaced due to becoming glazed by age  ).
_________________
1988 built (1989 F-registered) Citroën 2CV-Six
2013 (63-Plate) VW Golf SE 1.4TSI BMT DSG7
1932 Morris Minor Open Two-Seater (The £100 car).
|
| February 6th, 2012, 12:52 pm |
|
|
|
Sean
Firing on two.
Joined: April 22nd, 2009, 11:06 pm
Posts: 3684
Location: Ecosse
|
Re: When to replace brake disks? but your car has been in almost constant use?
a car thats been sat up for a while often has glazed rust as the brake surface - ive always found chipping this off and sanding back never gave long lasting results a n.ew set of disks at £35 and you have a good pedal from the word go and a fighting chance of a working handbrake.
_________________
Kissing the Lash
"Any advice of a technical nature is given on the understanding that I've actually done this shit, not just read about it in D*lly club mag some time ago.
|
| February 6th, 2012, 1:09 pm |
|
|
|
ken
Agony Aunt - You have a car problem? Speak to Ken
Joined: March 6th, 2009, 1:40 am
Posts: 3675
|
Re: When to replace brake disks? Viking, 6 sets of discs here, supposedly from 2 different manufacturers, but all stamped with minimum thickness of 6.3mm. If you compare that with Citroen's recommendation of 4mm minimum, that's the service life reduced by a factor of 4. Cheeky beggars...  Cracking is most commonly associated with overheating, but quenching hot discs with (or in) water is a short cut to disaster. ken 2CViking wrote: Devils Advocate wrote: Blimey - I guess being the recommended min thickness it will be safe, but 4mm strikes me as being scarily thin That is Citroens minimum. All new none Citroen disc have 5 mm stamped on as minimum.
_________________
|
| February 6th, 2012, 3:49 pm |
|
|
