Front Disc Run-out Checking - Spacer Suggestions?

Randyjim · 30th April 2024, 12:16

Hi!

I'm planning on changing the front disc and pads on my ZT190 this weekend as I need to cure some brake judder. I will be checking the hubs and discs for run out of course, but I've found in the past that the wheel bolts are too long to hold the discs true to the hub without a spacer.

Does anybody have a suggestion for a handy bit of garage detritus that serves the purpose. I'm sure there must be something knocking around I can use, even if it's a left-field as a pair of bog roll tubes or some old spark plugs.

Synchromesh · 30th April 2024, 15:35

Nuts the same size as the wheel bolts or nuts slightly larger than the wheel bolts or pieces of steel tubing cut to the desired length. I have some steel tubing that used to be the legs of a stacking chair that is probably about the right size. If you cut the same amount off the four legs of your kitchen chair your wife will never notice!

rrobson · 30th April 2024, 19:49

Get a couple of spares and cut them down. Otherwise get a handful of washers. You don’t need to overthink this, your only wanting to hold the disc in place

Mike Noc · 1st May 2024, 06:45

Whilst you have your clock gauge handy check that the hub itself is running true. Had one years ago that was bent which caused a bit of judder which was cured by new discs for a while but then returned.

30th April 2024, 12:16	#1
Randyjim Regular poster MG ZT 190 Join Date: Nov 2016 Location: Gloucester Posts: 84 Thanks: 30 Thanked 25 Times in 21 Posts	Front Disc Run-out Checking - Spacer Suggestions? Hi! I'm planning on changing the front disc and pads on my ZT190 this weekend as I need to cure some brake judder. I will be checking the hubs and discs for run out of course, but I've found in the past that the wheel bolts are too long to hold the discs true to the hub without a spacer. Does anybody have a suggestion for a handy bit of garage detritus that serves the purpose. I'm sure there must be something knocking around I can use, even if it's a left-field as a pair of bog roll tubes or some old spark plugs.

30th April 2024, 19:49	#3
rrobson I really should get out more....... 75 tourer cdti, MG ZS 180, nissan terrano & 1.8t rover 25 Join Date: Feb 2010 Location: Pontefract Posts: 2,647 Thanks: 17 Thanked 295 Times in 218 Posts	Get a couple of spares and cut them down. Otherwise get a handful of washers. You don’t need to overthink this, your only wanting to hold the disc in place __________________ How to view a car - everything you need to help you inspect a used car VIS motor tester avalible to local members Injector removal tool and auto gearbox pressure tester now available

30th April 2024, 15:35	#2
Synchromesh Gets stuck in Rover 75 Saloon Join Date: Jan 2010 Location: Preston Posts: 625 Thanks: 50 Thanked 44 Times in 32 Posts	Nuts the same size as the wheel bolts or nuts slightly larger than the wheel bolts or pieces of steel tubing cut to the desired length. I have some steel tubing that used to be the legs of a stacking chair that is probably about the right size. If you cut the same amount off the four legs of your kitchen chair your wife will never notice!

1st May 2024, 06:45	#4
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,567 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Whilst you have your clock gauge handy check that the hub itself is running true. Had one years ago that was bent which caused a bit of judder which was cured by new discs for a while but then returned.