So I thought I would check my rear brakes just on the off chance as I saw someone mention that could be a cause of the droning/vibration at speed.

This is the nearside after a short run:

Click image to enlarge

Click image to enlarge

Just my opinion but i would first push the piston out by pressing the brake not so much it pops out and inspect it. if its badly pitted i would say the caliper lining is as well and probably needs replacing.

If it looks fine I would grease the piston and repeat procedure a few times to see if it frees up.

Also carefully check the sliding caliper pins for pitting and corrosion again if ok copper grease and reassemble.

Try a run and see if the temp drops

Last edited by Snowy90 L322 on 8th Nov 2021 5:04pm. Edited 1 time in total

I'm not sure I'm comfortable with putting copper grease on the piston. Not sure where you got that suggestion from, I've never heard of that before.

I have ordered a new set of pistons and seals from Rimmer Bros just now. I'll overhaul them as they are genuine TRW LR callipers.

I lifted the dust boot and could not see any corrosion or scoring on the piston at all. Christian.


Current Cars
2011 Range Rover Vogue SE
2020 BMW M4 Competition
2019 BMW X4

My RR Blog: www.facebook.com/L322Project
or
https://www.fullfatrr.com/forum/topic61540.html

Was the difference between the temperatures obvious to a touch by hand on the wheel ?

I am just curious because I haven’t got the luxury of an infrared temperature gauge and should check mine because they haven’t been serviced for a few years other than checking plenty of pad wear left.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Yes, the nearside was almost stone cold (ambient temperature) and the offside was boiling hot. The wheel was warm.

It's got so hot there the pad wear sensor is partially melted. Christian.


Current Cars
2011 Range Rover Vogue SE
2020 BMW M4 Competition
2019 BMW X4

My RR Blog: www.facebook.com/L322Project
or
https://www.fullfatrr.com/forum/topic61540.html

Thanks for reply.
I have just done the touch test on mine after a five mile errand run and both sides only just above cold.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

I reckon you're good to go then.

I fitted my retraction tool to stop the piston coming right out and I pushed the piston out with the pedal and it took a lot more effort than it should do. I'll take some pictures when I refurbish the callipers. Christian.


Current Cars
2011 Range Rover Vogue SE
2020 BMW M4 Competition
2019 BMW X4

My RR Blog: www.facebook.com/L322Project
or
https://www.fullfatrr.com/forum/topic61540.html

Caesium wrote:

I'm not sure I'm comfortable with putting copper grease on the piston. Not sure where you got that suggestion from, I've never heard of that before.

I have ordered a new set of pistons and seals from Rimmer Bros just now. I'll overhaul them as they are genuine TRW LR callipers.

I lifted the dust boot and could not see any corrosion or scoring on the piston at all.