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bob neville

Member Since: 30 Apr 2009
Location: Marbella
Posts: 3248

Help with front brake disc problem

After a bit of advice on a problem I have with front brake discs.

Two years ago new Delphi discs were fitted on my TD5, new pads etc and they were fine until last December when they were found they had gone out of true (hate to use the term warp !) . Garage put new discs on and pads (do not know the make of disc but it was certainly not s***part !

They appear to have gone again after 3000 miles, bad judder when braking.

Have I just been unlucky or is there something else that I should be checking when I fit new discs ?

Bushes etc seem fine but one thing I am suspicious of is I did have a sticking caliper last year, could this be part of the problem if it is sticking again ?

Vehicle stops in a straight line, no pulling to one side, just a very bad judder. I can also hear a sound of something catching/brushing on each wheel rotation that goes when the brakes are applied and it is this that makes me thing the discs are shot again.

I am fitting EBC discs this time and LR pads.

Thanks

Bob 2015 Jaguar XE240 R Sport - goes like ....... !!
2013 Defender 90 CSW - sold
2009 Defender 110 Double Cab - sold
2001 TD5 90 CSW - offroad project - sold to a forum member
2011 Porsche Boxster - for the sunny days !

24th Aug 2016 10:02am

ARC99

Member Since: 19 Feb 2013
Location: North Yorkshire
Posts: 1831

2008 Defender 110 Puma 2.4 USW Cairns Blue

I don't know about TD5's but I have had similar problems on a Range Rover Classic and Discovery 1. when the disc's were replaced with non genuine parts. It appears that the disc's had warped and it could only be put down to the make up of the steel used. I had the non genuine ones tested against a genuine set. The report showed all the genuine one to be the same but the non genuine varied from disk to disc.
I did have a set that when fitted did not run true this was down to the machining of the parts.

Just a thought have you checked to see if they have delaminated . Don't make old people mad.
We don't like being old in the first place,
so it doesn't take much to

us off.

Richard

24th Aug 2016 11:17am

bob neville

Member Since: 30 Apr 2009
Location: Marbella
Posts: 3248

Thanks Richard.

I am going to price up a set of genuine discs to see what the difference in cost is. The original discs lasted 13 years and I only replaced that as there was some corrosion on them, wish I hadn't bothered !

I will go and take a look to see if there is any delamination.

Bob 2015 Jaguar XE240 R Sport - goes like ....... !!
2013 Defender 90 CSW - sold
2009 Defender 110 Double Cab - sold
2001 TD5 90 CSW - offroad project - sold to a forum member
2011 Porsche Boxster - for the sunny days !

24th Aug 2016 11:59am

Bps

Member Since: 14 Feb 2016
Location: Lancashire
Posts: 837

I've used britpart cross drilled and grooved discs both solid and vented on various defenders and d2's and never had a problem, always used ebc green stuff pads as well

24th Aug 2016 12:19pm

JWL

Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443

Sort of makes you think to replace the calipers or the flexi brake lines first.

24th Aug 2016 8:18pm

Pinky

Member Since: 09 Jun 2016
Location: England
Posts: 210

2011 Defender 110 Puma 2.4 DCPU Baltic Blue

Before replacing them, if there is still plenty of wear left in them, get them machined in situ. Most decent garages have access to a machine that is bolted to the hub and grinds the disc level again. If you replace them the same could happen again. A friend had it done on his Toyota a few years back and no problems since.

24th Aug 2016 8:52pm

ickle

Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1795

2008 Defender 110 Puma 2.4 CSW Alpine White

I'd drop the wheels off, and try a dial gauge to check disc run out, you want a little bit to move the pads back off the discs after braking, I cannot find the spec we used to use on the trailing axle on TACR2's, but it was a few thou. Don't forget to put the wheel nuts on and torqued to the correct setting.

If there is a run out take the discs off and check the mating surfaces for cleanliness and the hub for running true.

Another cause can be the wrong torque on wheel nuts.

Good luck

Keith

24th Aug 2016 9:04pm

bob neville

Member Since: 30 Apr 2009
Location: Marbella
Posts: 3248

Thanks for all the advice.

It does look like a caliper has stuck on one side, one of the pads stays clear of the disc when the pedal is pressed.

Also found at least one flange bolt not tightened up so it makes me wonder what other horrors are lurking !

Before getting new discs I think I will strip both sides, put them back correctly and test the run out.

It looks like new calipers are needed anyway but I think the disc problem may be due to bad workmanship by the garage that did the job.

I will let you know how things progress !!

Bob 2015 Jaguar XE240 R Sport - goes like ....... !!
2013 Defender 90 CSW - sold
2009 Defender 110 Double Cab - sold
2001 TD5 90 CSW - offroad project - sold to a forum member
2011 Porsche Boxster - for the sunny days !

24th Aug 2016 9:33pm

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