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D4 rear brake disk replacement
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OJ-LR4
 


Member Since: 01 Oct 2017
Location: Loch Leven
Posts: 356

Scotland 2015 LR4 3.0 SDV6 SE Tech Auto Corris GreyLR4

That’s a bummer, try opening the bleed nipple on the caliper in question which might help, the piston usually goes back in ok but as you guess it’s got to be equally centred, hope you get on ok,
OJ
  
Post #187025819th Oct 2017 5:20 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 884

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

so got the new seal - which way round does it go? it's sort of cup shaped - does the smaller part of the cup go down inside the hole, or outwards away from it?!
  
Post #187117422nd Oct 2017 4:04 pm
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OJ-LR4
 


Member Since: 01 Oct 2017
Location: Loch Leven
Posts: 356

Scotland 2015 LR4 3.0 SDV6 SE Tech Auto Corris GreyLR4

From memory the seal has a slight taper on one edge this should be fitted in a direction so that the pressure from the fluid chamber forces the taper against the piston creating the seal



Not a brilliant drawing but it might help
  
Post #187132923rd Oct 2017 8:11 am
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Disco_Mikey
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Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 16162

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

A new caliper is £60

You are dealing with a critical safety system on the car

Is it really worth the risk?
 MMP Land Rover - Land Rover + Range Rover Specialist
www.Facebook.com/MMPLandRover

Unit 9, 42 Baird Avenue
Dundee
DD2 3TN

Alive Tuning Authorised Dealer - Performance Tuning + EGR Delete

Servicing + Repairs / Fault Diagnostics / EU3+EU4 EGR Blanking / Timing Belt + Oil Pump Replacement

Software Updates+Upgrades:
4x4 Info Enable / Sat Nav OTM / 3 Flash indicators / D4 Timed Climate Retrofit

My D3 Build Thread 
 
Post #187147823rd Oct 2017 3:08 pm
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OJ-LR4
 


Member Since: 01 Oct 2017
Location: Loch Leven
Posts: 356

Scotland 2015 LR4 3.0 SDV6 SE Tech Auto Corris GreyLR4

After thinking about it your probably right Mike, best not to take a chance if it’s not built up correctly, not worth taking the risk if a new caliper is only £60 Bow down

Some on eBay new for just under £40 if that helps
number:261152454140 check which side it’s for or give it an early Christmas and do both Mr. Green

Or message Mike and get them from him, at least you’ll know the quality will be good.
  
Post #187155223rd Oct 2017 6:09 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 884

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

so, trying to tighten brake calliper bracket bolts back up to 275 NM - which, in old money, is "damn tight" I kept on going with my torque wrench. It got tougher and tougher as expected but still no torque wrench click, then suddenly got easier. Took bolt back out, with some difficulty, and it's now elongated..... so I guess one shouldn't reuse the bolts, but nowhere does it say that..... or was I doing something wrong?
  
Post #187266426th Oct 2017 3:21 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 4166

England 2005 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

At least it didn't shear Whistle
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #187271326th Oct 2017 5:25 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 884

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

true. But I can't quite understand why it didn't work properly, tbh. Time to get new bolts I think.
The 275 Nm in Bodsy's bible is right, isn't it?
  
Post #187271526th Oct 2017 5:27 pm
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Disco_Mikey
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Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 16162

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Fronts are 275Nm Whistle
 MMP Land Rover - Land Rover + Range Rover Specialist
www.Facebook.com/MMPLandRover

Unit 9, 42 Baird Avenue
Dundee
DD2 3TN

Alive Tuning Authorised Dealer - Performance Tuning + EGR Delete

Servicing + Repairs / Fault Diagnostics / EU3+EU4 EGR Blanking / Timing Belt + Oil Pump Replacement

Software Updates+Upgrades:
4x4 Info Enable / Sat Nav OTM / 3 Flash indicators / D4 Timed Climate Retrofit

My D3 Build Thread 
 
Post #187272126th Oct 2017 5:46 pm
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OJ-LR4
 


Member Since: 01 Oct 2017
Location: Loch Leven
Posts: 356

Scotland 2015 LR4 3.0 SDV6 SE Tech Auto Corris GreyLR4

I thought you were working on the rear calipers? If you are the Torques for the 15mm bi hex caliper bolts 115Nm and the 13 mm slide bolts 35Nm normally best to use new bolts for these which come with the disc pad kit and thread lock on the caliper carrier bolts. Thumbs Up
  
Post #187274226th Oct 2017 6:46 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 884

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

hmmm
think I've misread. Am doing rears, bi-hex's - which aren't included in the kit, it seems - but if it's 115 that explains it Very Happy
  
Post #187274526th Oct 2017 7:08 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 884

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

arsey arsey Censored Censored

115Nm

thanks for pointing out the error of my ways.....
  
Post #187274726th Oct 2017 7:09 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 884

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

so discs on, pads on, wheel on one one side, just need to bleed the side I rebuilt the piston on. Where do people usually get the right sized pipe from to go from brake bleed nipple into my pot of dot4? The bits of piping I have lying around are all too big, and straws are too small Laughing
  
Post #187321928th Oct 2017 5:32 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 884

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

hmmmm. Help needed again.

All back together, EPB adjusted as per Bodsy, callipers back on, wheels on, etc.

But on IID Tool, the parking brake won't come out of Mounting to Latched (i.e. from service to normal). Went into service and tried the epb unjam procedure, but it says 'this function failed, E3'.

What's the likely problem and diagnosis approach? Note that the EPB doesn't appear to be on.

ta.....
  
Post #187346329th Oct 2017 4:54 pm
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OJ-LR4
 


Member Since: 01 Oct 2017
Location: Loch Leven
Posts: 356

Scotland 2015 LR4 3.0 SDV6 SE Tech Auto Corris GreyLR4

You’ve put all the fuses back in haven’t you ?

The EPB needs reset.

If the tool can’t reset it at your own discretion you could try applying the EPB as normal with the ignition on and hope it resets itself.

If you got the wheels etc on you’ve probably already bled the brakes, flex tube either part of the easy bleed kit or a length of clear 6mm ID tube warmed up to go over the bleed nipple for a nice tight fit

Hope you get on ok
Thumbs Up
  
Post #187349629th Oct 2017 7:02 pm
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