Hot rear discs?

Bomster · Apr 30th, 2022, 07:14

Morning all,

Did all discs, pads and fluid a few weeks back, and thought I'd do a bit of a test this morning on my 20 mile commute into work.

I set off early and drove the whole way without using any brake application. Got to work and the front discs were stone cold (as expected), but both rear discs had some heat in them (50 deg c at a guess).

I was doing some fairly fast cornering (partially due to the lack of braking, but mostly that's just my driving style lol)... so I was wondering, does the ESC activate the rears, hence the heat?

Or have I just got two sticky rear callipers. I would be a little surprised as the rears looked in good condition.

Appreciate any input, thanks

Familyman 90 · Apr 30th, 2022, 09:10

Something is binding .

Presumably you used a proper caliper tool to reset the pistons, properly cleaned around the piston seals, and cleaned and relubed the guide pins?

Bomster · Apr 30th, 2022, 09:29

Quote:

Originally Posted by Familyman 90

Something is binding .

Presumably you used a proper caliper tool to reset the pistons, properly cleaned around the piston seals, and cleaned and relubed the guide pins?

Could well be binding, but I just have a hunch it's some sort of stability control activating the rear brakes... maybe just wishful thinking.

The car has an EPB, so the piston is retracted electrically, and then just pressed back with a g-clamp (VIDA guide mentions that it should not be rotated). Gave everything a good clean down, and relubed everything, but perhaps I wasn't very thorough, only my second time working on brakes. Will do some more investigating and then strip down if needs be.

passenger · Apr 30th, 2022, 22:35

Volvo do not recommendet grease on pins. Althought I found some grease on them. Brakes are done 3y ago in Volvo on my car and found grease.

XC90Mk1 · May 1st, 2022, 13:36

Quote:

Originally Posted by Bomster

Could well be binding, but I just have a hunch it's some sort of stability control activating the rear brakes... maybe just wishful thinking.

The car has an EPB, so the piston is retracted electrically, and then just pressed back with a g-clamp (VIDA guide mentions that it should not be rotated). Gave everything a good clean down, and relubed everything, but perhaps I wasn't very thorough, only my second time working on brakes. Will do some more investigating and then strip down if needs be.

Very wishful thinking!

They will be binding

simboc2004 · May 3rd, 2022, 07:40

I follow Volvoseden's Youtube video on resetting the EPB when fitting new pistons to my 2011 car - I'm sure just pushing them back in isn't right? - I use a Torx socket on a ratchet to wind the pistons back in. I have done this twice now and it works really well. You do need to remove the electric activator, however this isn't difficult and just means - at worst - replacing the cap bolts and seal (I have only needed to do this once to one side).

simboc2004 · May 3rd, 2022, 07:41

VolvoSweden - oops

Bomster · Dec 5th, 2022, 15:34

Is there a good supplier for buying new/refurb rear callipers? My car model is in my signature

... or is there a good quality rebuild kit?

passenger · Dec 5th, 2022, 17:26

daparto.de or autodoc

First is cheaper

100K+ · Dec 6th, 2022, 08:25

Before I splashed the cash for callipers I’d read the brake post started by “Ferdinotch”..(a few post down from this one)
A couple of suggestions/comments make interesting reading..
Cheers Bob

Apr 30th, 2022, 07:14	#1
Bomster Member Last Online: Mar 12th, 2024 22:26 Join Date: May 2014 Location: East Anglia	Hot rear discs? Morning all, Did all discs, pads and fluid a few weeks back, and thought I'd do a bit of a test this morning on my 20 mile commute into work. I set off early and drove the whole way without using any brake application. Got to work and the front discs were stone cold (as expected), but both rear discs had some heat in them (50 deg c at a guess). I was doing some fairly fast cornering (partially due to the lack of braking, but mostly that's just my driving style lol)... so I was wondering, does the ESC activate the rears, hence the heat? Or have I just got two sticky rear callipers. I would be a little surprised as the rears looked in good condition. Appreciate any input, thanks __________________ Current cars: 2011 Volvo XC70 D5 (205) AWD Auto SE Lux 2010 Renault Clio 200 RS

Apr 30th, 2022, 09:10	#2
Familyman 90 The Brit Brick Last Online: Aug 13th, 2023 09:39 Join Date: Jul 2021 Location: Warwickshire	Something is binding . Presumably you used a proper caliper tool to reset the pistons, properly cleaned around the piston seals, and cleaned and relubed the guide pins? __________________ *2005 C70 2.4T Collection convertible. 40,000 mile sunny day toy.*

May 3rd, 2022, 07:40	#6
simboc2004 SimboC2004 Last Online: Today 17:31 Join Date: May 2019 Location: Diss	I follow Volvoseden's Youtube video on resetting the EPB when fitting new pistons to my 2011 car - I'm sure just pushing them back in isn't right? - I use a Torx socket on a ratchet to wind the pistons back in. I have done this twice now and it works really well. You do need to remove the electric activator, however this isn't difficult and just means - at worst - replacing the cap bolts and seal (I have only needed to do this once to one side). __________________ Volvo V70 P3 ES D3/D4 2011 - 170,000 miles in Black Stone Volvo V40 R-Design Nav Plus D4 190 - 60,000 miles in Osmium Grey Past: '90 944 2.0 turbo, '91 944 2.0, '92 945 2.0 turbo, '95 945 2.3 HPT, '09 C30 2.0D R Design 180bhp+, '13 C30 D2 Lux.

May 3rd, 2022, 07:41	#7
simboc2004 SimboC2004 Last Online: Today 17:31 Join Date: May 2019 Location: Diss	VolvoSweden - oops __________________ Volvo V70 P3 ES D3/D4 2011 - 170,000 miles in Black Stone Volvo V40 R-Design Nav Plus D4 190 - 60,000 miles in Osmium Grey Past: '90 944 2.0 turbo, '91 944 2.0, '92 945 2.0 turbo, '95 945 2.3 HPT, '09 C30 2.0D R Design 180bhp+, '13 C30 D2 Lux.

Dec 5th, 2022, 15:34	#8
Bomster Member Last Online: Mar 12th, 2024 22:26 Join Date: May 2014 Location: East Anglia	Is there a good supplier for buying new/refurb rear callipers? My car model is in my signature ... or is there a good quality rebuild kit? __________________ Current cars: 2011 Volvo XC70 D5 (205) AWD Auto SE Lux 2010 Renault Clio 200 RS Last edited by Bomster; Dec 5th, 2022 at 15:43.

Apr 30th, 2022, 22:35	#4
passenger Master Member Last Online: Apr 2nd, 2024 21:40 Join Date: Feb 2021 Location: Mountains	Volvo do not recommendet grease on pins. Althought I found some grease on them. Brakes are done 3y ago in Volvo on my car and found grease.

Dec 5th, 2022, 17:26	#9
passenger Master Member Last Online: Apr 2nd, 2024 21:40 Join Date: Feb 2021 Location: Mountains	daparto.de or autodoc First is cheaper

Dec 6th, 2022, 08:25	#10
100K+ Premier Member Last Online: Today 17:36 Join Date: Aug 2008 Location: Newcastle	Before I splashed the cash for callipers I’d read the brake post started by “Ferdinotch”..(a few post down from this one) A couple of suggestions/comments make interesting reading.. Cheers Bob

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