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"How to" Change Discs and Pads on 200/25/ZR + 400/45/ZS and possibly others.

113K views 138 replies 63 participants last post by  davey4eva  
#1 · (Edited)
"How to" Change Discs and Pads on 200/25/ZR + 400/45/ZS and possibly others.

First of all I would just like to point out that some people may have different methods to me and that's fine. I'm just showing the method that I use to change my discs and pads, it's possibly not perfect or the quickest method, but it's the one which I find works well for me. If anyone wants to offer their own suggestions or comments please feel free.

This "How To" guide shows how I change the pads and discs on a 1998 Rover 218iS. The discs on this particular model are vented but the method is exactly the same regardless of the disc type. I think that this guide will apply to the 200/25/ZR, 400/45/ZS, and also the 200/400 R3 (wedge shape). The metro and MGF may also use very similar looking calipers. :)

If you are changing just the pads please skip Post #2.

My car had been stood for sometime and I thought that as the brakes have not been used much recently I would remove them, clean them up and then refit. The pads and discs were perfectly serviceable, they just needed a little TLC. Even though I've only refitted the original discs and pads I've tried to write this guide so that it will be useful for those replacing them with brand new discs and pads. I've taken a lot of time over making this guide so I hope that you find it useful.

Tools Required For Changing The Brake Pads Only:
Trolley Jack or Scissor Jack
Axle Stand(s)
19mm Socket
12mm Socket
1/2" Drive Ratchet
1/2" Drive Breaker Bar/Socket Bar
Large Flat Screwdriver
A small length of string or wire
Copper Grease
Heavy Lithium Grease (Can be substituted by Copper Grease if needs be)
Flat File
Emery Tape or similar
Wire Brush
G-Clamp

The very first thing to do is remove the front wheel, I started on the passenger side.
Use the Breaker Bar and 19mm Socket to crack the wheel nuts undone (don't remove them).
Now jack the car using a trolley jack or scissor jack and then support it on an axle stand. Please do not work on the vehicle without an axle stand for safety purposes.
Now remove the wheel nuts and the wheel.

This will be what you'll see once you have the wheel removed.
Image


Now the next step is to pivot up the Brake Caliper. To do this you'll need a 12mm Socket and a Ratchet.
Locate the lower 12mm Bolt shown in the picture below and remove it.
Image


With this lower bolt removed the caliper will now pivot upwards on the top bolt leaving the pads against the brake disc. Pivot the Caliper up and tie it to the suspension spring with either a piece of string or wire.
Image


Now remove the old brake pads from the Carrier, they will pull out or if they're a little tight use a strong screwdriver to ease them out (do not put the screwdriver between the pad and disk, you will damage the disk).
Image


If you're also replacing the disks continue reading post #2. If you're only replacing the pads, please skip to post #3. ;)
 

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#123 ·
Many thanks for this guide. Replaced discs and pads on an 05 Rover 45 Diesel. Had to take the wheel off to check the discs were solid or vented (solid in my case, vented in these pictures).

Bought Mintex discs and pads on eBay for ÂŁ42 delivered and copper grease from Halfords and away I went. No real issues. I used a PH3 screw bit and a 12 inch adjustable wrench to turn when doing the discs and mine (thankfully) shifted easy.

Clearly the mechanical parts of this (undoing bolts) doesn't take long it's the cleaning and the greasing that takes the time and probably rushed by most chain garages. At least if you do it yourself you know it wasn't rushed and saved myself ÂŁ150 in the process. Thanks again
 
#125 ·
I've got to add to the long list of thank you's for this excellent guide. Did my wifes ZR TD today following this guide and the job went a treat. Excellent step by step advice and top pictures made it really straight forward. Best guide that i've followed and that includes Haynes etc so well done mate

Cheers
Dale
 
#129 ·
Thank you!!!!!!!

Im a 43 year old woman who has NEVER attempted anything on my car....i followed your fab instructions word for word....in the dark....with the Scottish wind blowing at its finest....and I DID IT :):clap::taz:ME!!!! on my own thank you so so so so much, i never could of afforded a garage fee and i can now drive down to England to spend christmas with my son
 
#131 ·
Super Guide

God knows, I`m no mechanic and the fear of messing with something so important as brakes filled me with fear! However, I found your guide easy to follow and using it as a step by step formula, I managed to do a highly successful job. I am now pleased to announce that my 2002 Rover 25 has just passed it`s M.O.T. with no advisories!

Many Thanks!!
 
#135 ·
I replaced the disc, callipers and pads on my R25, about six weeks ago. The pads that I fitted were a very snug fit and didn't have the clip that holds them to the piston and didn't come with new shims. Use some copper grease to help prevent the pads from rusting to the carriers and, as a part of your maintenance routine, remove them and re-grease once a year.
 
#136 ·
The shim between the piston and inner brake pad isn't essential, and it won't matter if you don't have one, but don't ever fit pads without the stainless shims between the ends of the pads and the carrier casting - they are essential to help the pad slide as the brake is applied and released (and as the pads are designed to be used in conjunction with the shims, they are likely to rattle of the shims aren't fitted). Most aftermarket pads are supplied without new ones, so either get the appropriate brake pad fitting kit, or re-use your old ones if necessary.
 
#137 ·
I'm planning on changing my brake rotors and pads on my 25 but kind of puzzled.
I've searched online for the parts but there is 2 size rotors available.
There is 13mm thickness and 23mm, can i use either or?
Don't want to go for the thicker one if its not going to fit.
Any help would be appreciated.
 
#138 ·
I'm planning on changing my brake rotors and pads on my 25 but kind of puzzled.
I've searched online for the parts but there is 2 size rotors available.
There is 13mm thickness and 23mm, can i use either or?
Don't want to go for the thicker one if its not going to fit.
Any help would be appreciated.

The thicker discs are vented, and usual found on the larger engined cars. If you 25 is only a 1.4 go for the thinner disks.