Member Since: 16 Sep 2019
Location: Newcastle Under Lyme, Staffs
Posts: 171
rear brake calipers
Hi, noticed my offside rear wheel was red hot & smelling yesterday, stripped it all down and the problem is that the caliper piston has corroded under the rubber seal, causing the brake to not release the pressure on the pads. Made a temporary fix with some WD40 and a bit of pumping/pushing the piston.
Ordered a pair of new calipers last night.
Does anyone know the size of the copper crush washers for the banjo bolt connections for the brake lines ?
Thanks2005 TDV6 SE Auto
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24th Apr 2020 7:11 am
rrhool
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4545
M10. 15mm od.
Richard
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone
Whilst you are in there, it may be a good time to replace the flexi brake hoses. Just replaced all the calipers on mine and replaced the flexi brake hoses for Stainless Steel ones.
Member Since: 16 Sep 2019
Location: Newcastle Under Lyme, Staffs
Posts: 171
Thanks for the info.
I'm surprised the piston was sticking, as I have the service history and receipts for the car before I bought it and both rear calipers were replaced in Oct 2016, and it's only done around 25K miles since then.
Anyhow they're cheap enough, got a pair for £59 delivered, got them from the same Ebay seller I bought a pair for my Disco 2 rears from, they lasted over 4 years without any problems
Thanks2005 TDV6 SE Auto
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24th Apr 2020 7:45 am
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
The elcheapo calipers are actually pretty good, and at them prices are almost disposable.
You can reanneall the copper washers, heat them with blow torch until glowing, then drop into cold water.
24th Apr 2020 5:59 pm
matgriff
Member Since: 16 Sep 2019
Location: Newcastle Under Lyme, Staffs
Posts: 171
Hi, yeah I mostly do anneal the copper sealing washers, but I always have a stock on hand just in case the originals are beyond saving or as sometimes people use an aluminium one, and they tend to get pretty chewed up.
I agree about the cheap calipers, the only problem is probably the poor quality of the piston plating, but I doubt even the more expensive ones use stainless pistons.
I'll strip & refurb the ones that are on now and keep them as a spare pair.
Thx
Mat2005 TDV6 SE Auto
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25th Apr 2020 8:16 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10773
There is a groove near the rubber boot which needs cleaning out.
This is key for referb them
25th Apr 2020 8:31 am
matgriff
Member Since: 16 Sep 2019
Location: Newcastle Under Lyme, Staffs
Posts: 171
All done
One of them was completely seized, couldn't get the piston out even with compressed air, corrosion was pretty bad, so I just trashed them... for £28 each I figured it's not worth the hassle. A piston & seal kit is around £18 per side anyway.
Brakes work great now.2005 TDV6 SE Auto
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25th Apr 2020 5:03 pm
TT___50
Member Since: 07 May 2017
Location: God’s own Country
Posts: 171
I had the same problem on my rears, no way I was getting the pistons out without ruining the whole calliper. Shame as I wanted to refurb as an exercise and hopefully as spares after but nothing would release them!
26th Apr 2020 8:31 am
L319
Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2083
The best way I have found is to use the brake system to push the pistons out, before detaching from the car, putting a block of wood in the gap so they don't totally pop out. One I remember I really had to stand on the pedal to get it to move.
26th Apr 2020 9:12 am
matgriff
Member Since: 16 Sep 2019
Location: Newcastle Under Lyme, Staffs
Posts: 171
I got it out in the end, the bore was all scored and damaged, and it was badly corroded, I just scrapped them.2005 TDV6 SE Auto
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