Author Topic: Problem with front brake disc removal  (Read 4158 times)

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Offline davidbird

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Problem with front brake disc removal
« on: March 14, 2016, 09:21:42 PM »
At the last MOT, end of last year, I had an advisory on discs and pads all round.  Last week, I managed to change the rear pads and discs with not too much problem.  Now, I'm onto the fronts.  Dismantled the caliper, carrier and removed old pads on the rhs.

But I can't get the disc off the hub.

Any ideas - or is it just a case of the BFH?

Thanks
Heat is work and work's a curse
And all the heat in the universe
Has gotta cooool down, 'cause it can't increase
Then there'll be no more work and perfect peace

Really?
Yeah, that's entropy, man!

Offline Willpower

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Re: Problem with front brake disc removal
« Reply #1 on: March 14, 2016, 09:41:09 PM »
In case you have not come across it already, here is a link to the workshop manual.     http://www.mazda3forums.co.uk/workshopmanual/     FOR GEN 1 VEHICLES ONLY

I've had a quick look and there does't seem to be any specific problems/methods to remove the disc. But it might help you in some way.  :)
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Offline keith h

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Re: Problem with front brake disc removal
« Reply #2 on: March 14, 2016, 09:54:00 PM »
Hi David. Use "Plus GAS" releasing oil, i think its better than wd 40, use a copper or lead hammer to break the bond. It may take some time but it will eventually move. Regards Keith h

Offline davidbird

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Re: Problem with front brake disc removal
« Reply #3 on: March 14, 2016, 10:16:54 PM »
In case you have not come across it already, here is a link to the workshop manual.     http://www.mazda3forums.co.uk/workshopmanual/     FOR GEN 1 VEHICLES ONLY

I've had a quick look and there does't seem to be any specific problems/methods to remove the disc. But it might help you in some way.  :)
Thanks, I have found that and I'm following page 1432, but as you say nothing on actually removing beyond "remove in the order shown"...
Hi David. Use "Plus GAS" releasing oil, i think its better than wd 40, use a copper or lead hammer to break the bond. It may take some time but it will eventually move. Regards Keith h
Thanks, Keith.  I'm trying to squirt plusgaz into the small gaps around the studs to try and get it behind the disc.  I'll leave it overnight and then try using the blowtorch to attempt to expand the disc slightly to break the seal.

Any tips on pushing the piston back without the SST?
Heat is work and work's a curse
And all the heat in the universe
Has gotta cooool down, 'cause it can't increase
Then there'll be no more work and perfect peace

Really?
Yeah, that's entropy, man!

Offline Tall333

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Re: Problem with front brake disc removal
« Reply #4 on: March 15, 2016, 01:36:27 PM »
I had a similar problem on a Citroen a while ago, ie discs wouldn't budge.  I ended up cutting a slot through it with an angle grinder and getting a suitable chisel in behind it.

Offline davidbird

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Re: Problem with front brake disc removal
« Reply #5 on: March 15, 2016, 01:49:34 PM »
I had a similar problem on a Citroen a while ago, ie discs wouldn't budge.  I ended up cutting a slot through it with an angle grinder and getting a suitable chisel in behind it.
Funny you should say that  :-\   This morning I've managed to get the "disc" part of the disc off, the "hub" part of the disc is still firmly attached to the actual hub...  I've already dug out the angle grinder and when the shop re-opens I'm going to get another metal cutting disc for it.  That seems to be the only solution now...
Heat is work and work's a curse
And all the heat in the universe
Has gotta cooool down, 'cause it can't increase
Then there'll be no more work and perfect peace

Really?
Yeah, that's entropy, man!

Offline davidbird

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Re: Problem with front brake disc removal
« Reply #6 on: March 15, 2016, 09:25:13 PM »
Thanks all for your help.  It's now all back together again, nice and shiny.

If anyone else experiences the same problem, this may help.

After cutting a slot in the disc, I found that there seemed to be a gap between the remains of the disc and the hub itself, the easing oil I put into the gap was flowing quite freely out around the holes for the stubs.  I tried liberal amounts of Pluzgaz applied to the edge of the hub from the inside.  The angle of the wheel pointing downwards (axle-stands on the frame rather than the suspension)  helped to hold quite a puddle of oil and by rotating the hub it spread the oil around.

That did the trick.
Heat is work and work's a curse
And all the heat in the universe
Has gotta cooool down, 'cause it can't increase
Then there'll be no more work and perfect peace

Really?
Yeah, that's entropy, man!

Offline Marvandgoldie

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Re: Problem with front brake disc removal
« Reply #7 on: June 08, 2016, 12:34:31 PM »
Hi, I have a 2011 3 TS and I am trying to replace the front brake discs but I can't for the life of me move mine, are the 2007 the same as the 2011 set up? If so is the only way to get the disc off with a grinder?
« Last Edit: June 08, 2016, 12:38:11 PM by Marvandgoldie »

Offline Marvandgoldie

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2011 3 Front Disc Removal
« Reply #8 on: June 08, 2016, 12:47:53 PM »
Hey folks,

Looking for some help/advice please. I am needing to change the front brake discs on my 2011 Mazda 3 and have been looking all over the internet and everything I am seeing is making it look so easy but mine just wont budge. Never had a car have the brake discs stuck on this tight! Tried a gear puller on it, heating, WD40 etc.etc. Not tried the angle grinder on it yet!!

I must be missing something simple, there is a large nut in the centre of the disc but I thought this has something to do with the wheel bearing and all the stuff out there on the tinterweb says nothing about removing this?

Anyone have any ideas on it?

Offline StevenRB45

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Re: Problem with front brake disc removal
« Reply #9 on: June 25, 2016, 09:17:33 AM »
Well my car is currently in the air and it would appear it fought the garage...had to wander off as he "persuaded" the drivers side disc off with a 4 pound hammer.
« Last Edit: June 25, 2016, 09:19:21 AM by StevenRB45 »

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Re: Problem with front brake disc removal
« Reply #9 on: June 25, 2016, 09:17:33 AM »