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MG MGF Technical - disc brakes

Has anyone any helpful hints on how to remove the front brake discs fron the hub flange. Having removed the retaining screws - with considerable difficulty- the discs seem to be well rusted on - WD40 and moderate persuasion with a heavy copper mallet haven't so far budged the disc from the flange. I hesitate to use heat. The discs need replacing.
Mike Armstrong

Tis now 2 hours since posting this plea.
I had a cup of tea - read back further into the MGF archives - got a bigger hammer and hit the disc even harder. It came off and the other side took only 5 mins.
Moral of the story - get as big a "persuader" as you can - hit it as hard as you can - and for goodness sake wear a pair of goggles as rust chips fly everywhere.
Now to put it all together.
Mike Armstrong

Sorry Mike, my PC has been off line most of the day.

My suggestion would have been to have a cup of tea - it worked for me once when I couldn't shift a set of F*r* disks.

Bit late... but...

Big hammer (rubber is best) and hit the disc, turn the disc, hit the disc, turn the disc... etc.

It's an interference fit and heavy hitting with a hammer without changing where you hit it does nothing but purge your anger. :-)

At least this'll be in the archives now although it didn't help you. Ooops.

Paul Nothard

Two pound builders lump hammer in my case.

I suggest cleaning up the mounting faces very well using emery paper and reseat the new disks on copper grease.

Also renew the fixing screws, I wrecked one of mine refitting it and will need to drill it out next time.

I had this prob, the discs but they are to be replaced
so BASH THE LIVING SH1TE out of them!

beleive me they'll always come off and go straight in the bin!

I think we get through a lot of discs we F'ers

beacause they are laughably small!!

What replacement discs did you fit guys? Looking for replacement discs myself, and was hoping for some ideas?


The discs are too small, so i have asked Santa for some bigger ones. Whether i have been a good enough a boy this year...I suspect not...and they turn up is another matter.
Leigh have a look on Mike Satur's site, he does some useful big disc conversion set ups. or just go for better pads green stuff or the Mintex 1177 bricks that Rob B uses and normal 30 std rover discs as they will get quickly eaten by the pads

What mileage should one get out on average out of a set of discs? My F is a 1999 MY2000 with 27k and they still appear ok.

david stonehouse

>>What replacement discs did you fit guys? Looking for replacement discs myself, and was hoping for some ideas?<<

Standard size or big-brake upgrade Leigh?

I use Roversport standard-sized Grooved discs all round - but you could also use the almost identical EBC turbo-groove discs as an alternative. :o)

I believe that discs are also available from other manufacturers, including Black Diamond.

Why use grooved discs? They are great for two reasons. First, under heavy usage, they clear pad debris from the contact patch to ensure that brake performance remains excellent. Second, I think that they stop the pads glazing over after repeated light pedal applications (typical of city driving).

Regarding big disc conversions, you could consider the following:
1. MGR Trophy 160 discs and calipers - but you'll need to source Trophy or TF160 wheels as well.
2. Mike Satur's excellent front disc conversion. Looks awsome!
3. HiSpec brakes (these guys are good, because they supply both front and rear discs and calipers if needed) - see
4. AP Racing do a kit, but you don't want to know how much these are....!!! 8oO
Rob Bell

I decided to use standard and not grooved discs based on the theory that, for road use only, the grooved disc offers no improvement and there is a big cost difference. The grooves come into play on track days when the repeated heavy braking heats the disc and the grooves + holes give more air turbulence and therefore more cooling. There are lots of references to increaed brake noise from grooved discs and this seems to upset some people.

I also believe that the scoring which inevitably occurs on discs after 20k miles or so, reduces the contact area between disc and pad. Although the disc is not worn out, the braking effort is reduced. New standard discs and Greenstuff pads made a huge difference to the pedal pressure needed to stop.

Hi Guys,

As it's 90 for the grooved discs and 30 for the standard ones, and I don't tend to do track days (although some of the driving on the CSMGF days can be a bit hairy!), I think I'll go with those.

I think my discs have corroded more as the car sits outside for most of the week, and is only used at the weekend.



This thread was discussed between 01/12/2002 and 16/12/2002

MG MGF Technical index

This thread is from the archive. The Live MG MGF Technical BBS is active now.