How To Spot What's Warped

KeepDigging · Dec 18, 2013

The Disco (non-ABS 300 TDi) has had a pulsating brake pedal since I acquired her so, obviously, she's got a warped disc. (If anyone objects to me referring to a car as "her", let me point out that she's called Vicky and I don't know many fellas with that name!)

Anyway, it's not bad but it is likely to upset the MOT tester.

Before I go and splash out on getting a full set of discs, any ideas on spotting which one's warped? (I promise I'll replace both discs on that axle).

No steering wobble just a bouncy pedal and less-than-smooth deceleration. Can't get both axles in the air at the same time but I can get both ends of one up.

Is this the excuse I need to buy a dial gauge?

quattro6999 · Dec 18, 2013

Have you checked the wheel bearings for play?

KeepDigging · Dec 18, 2013

quattro6999 said:
Have you checked the wheel bearings for play?

Good call. No I haven't. I presumed that because it corners with such precision (oh yes it does!) and has no wandering at speed that they'd be fine, but I'll check. Adjustment's cheaper than replacement

KeepDigging · Jan 6, 2014

It's not the wheel bearings.

4 new discs then. Chances of changing them without damaging a hub?

landowner · Jan 6, 2014

You'll be ok

Replacing front brake discs - Land Rover Technical Archive - LR4x4 - The Land Rover Forum

KeepDigging · Jan 6, 2014

Mucho Thanks

nrgserv · Jan 6, 2014

KeepDigging said:
The Disco (non-ABS 300 TDi) has had a pulsating brake pedal since I acquired her so, obviously, she's got a warped disc. (If anyone objects to me referring to a car as "her", let me point out that she's called Vicky and I don't know many fellas with that name!)

Anyway, it's not bad but it is likely to upset the MOT tester.

Before I go and splash out on getting a full set of discs, any ideas on spotting which one's warped? (I promise I'll replace both discs on that axle).

No steering wobble just a bouncy pedal and less-than-smooth deceleration. Can't get both axles in the air at the same time but I can get both ends of one up.

Is this the excuse I need to buy a dial gauge?

jack a wheel up, diff lock out, chock the other 3 wheels, run in gear and lightly press the brake.
repeat with remaining wheels until you get the pulsing.

DIFFLOCK66 · Jan 6, 2014

Wise words! Just don't try that with a Disco series 2 - traction control will get upset, as would the owner when it tries to jump over the chocks and off the jack

nrgserv · Jan 7, 2014

DIFFLOCK66 said:
Wise words! Just don't try that with a Disco series 2 - traction control will get upset, as would the owner when it tries to jump over the chocks and off the jack

I did re check it was a 300 non abs

KeepDigging · Jan 8, 2014

Doh! I should have thought of that myself.

Couldn't feel anything through the pedal but the front discs have a heck of a lip on them and the rears look, well, horrible. Might as well book a day off work and swap the lot (following landowner's excellent link). At least I know they're good then.

DIFFLOCK66 · Jan 8, 2014

nrgserv said:
I did re check it was a 300 non abs

HEHE. I only posted in case anyone with a Disco 2 and no knowledge thought that the procedure would work on their vehicles .... and I'm being a twunt

How To Spot What's Warped

KeepDigging

New Member

quattro6999

New Member

KeepDigging

New Member

KeepDigging

New Member

landowner

Pensioner Pete

KeepDigging

New Member

nrgserv

Well-Known Member

DIFFLOCK66

Well-Known Member

nrgserv

Well-Known Member

KeepDigging

New Member

DIFFLOCK66

Well-Known Member

Similar threads