Member Since: 11 Aug 2017
Location: Helsinki
Posts: 6565
Warm rear right wheel
Seems like I got a “hot” right wheel in the rear today. Noticed it by a funny smell, walked around the vehicle. It wasn’t burning hot but clearly much warmer compared to all three other wheels which were cold. There wasn’t any noise or funky shuddering while driving. The brake disk looked visually ok between the wheel spokes.
Are there any easy ways to determine whether it’s the brake shoes or the caliper that’s stuck? Is it possible for it to be something else with these symptoms?
Thanks.
2nd Apr 2018 6:03 pm
Sydney
Member Since: 11 Aug 2013
Location: St Neots
Posts: 903
Digital thermometer, thermal camera even better, on the brakes. Hot disk is caliper sticking, hot drum is parking brake.De-Tango
V8 Brakes
EGRs blanked
Running boards
3 flash indicators and clock on dash
Blingy grille...
2nd Apr 2018 7:15 pm
kajtzu
Member Since: 11 Aug 2017
Location: Helsinki
Posts: 6565
Thanks Sidney - sounds like excellent advice!
2nd Apr 2018 7:39 pm
CMG
Member Since: 12 Jul 2010
Location: USA
Posts: 956
Does it have any extra brake dust on that wheel? On my Jeep once I had a caliper stick and I noticed it from that wheel being a lot dustier than the other 3.17 Discovery 5 HSE Si6, Fuji White on brown | 07 LR3 SE 4.4 Java Black on Alpaca
Club V8/Club OCD
3rd Apr 2018 12:55 pm
ruben D3 Decade
Member Since: 26 Sep 2006
Location: ASTURIAS
Posts: 2382
Hi,
in my case it was an excessively tight parking brake (too approximate) in the periodic maintenance. It produced an overheating, and a very strong vibration, that destroyed the braking system of that wheel, specifically the left rear.lost in translation!
3rd Apr 2018 3:19 pm
kajtzu
Member Since: 11 Aug 2017
Location: Helsinki
Posts: 6565
Thanks guys - the wheels didn’t seem to have any difference in terms of brake dust.. pretty much dustless all of them actually...
Today, when I tried to pinpoint this further by engaging the EPB in the parking garage - windows down to hear better - driving a bit forward, stopping, engaging, etc. there was a weak squeal. The same happened also when I tried reversing.
Fuel economy has also gotten worse by roughly 1.6 L/100 km, now at 16.8 instead 15.2 - according to the onboard calculator.
3rd Apr 2018 3:53 pm
Dave T
Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6902
I would start by whipping the Caliper off and giving it a good clean, including the slides, you may be lucky.Joined the BMWX5 45e group
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3rd Apr 2018 5:05 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
I don't think you can tell with dust, but if the disc is more of a blue colour then caliper.
You should really service the park brake while the caliper is off to avoid further problems.
Remove shoes and lube arm
3rd Apr 2018 6:06 pm
kajtzu
Member Since: 11 Aug 2017
Location: Helsinki
Posts: 6565
Took it to the indy this morning. They took the wheels off and diagnosed it pretty much the same as we here did
In the front, the brake caliper on the left wheel was stuck. The seals had been trashed, water had entered where it shouldn’t have, some rusting, etc. seems to have happened over a long time. New caliper required. they didn’t think it would make sense to repair the old one. Front brake disks were not warped, plenty of material left in the pads.
In the rear, the right rear wheel brake shoes were loosely stuck but they thought lubing & adjusting would be enough. Plenty of surface left in the shoes, pads and rear disks.
Thanks everyone for your collective hive mind.
5th Apr 2018 1:36 pm
kajtzu
Member Since: 11 Aug 2017
Location: Helsinki
Posts: 6565
I’m truly shocked how much fuel economy changed. Right before I took the vehicle in I had 16.8 L/100 km. Now having driven ~200 km mixed it’s down to 13.2 L/100 km according to the built in estimator.
When I got the car it was doing around 14.8 so it has gotten gradually worse and I guess based on this the problem has been on for a longer time - I only noticed it recently.. Of course, I put the increased consumption for winter economy.
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