Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-26-2021, 08:24 PM
LVP LVP is offline
Member
 
Join Date: Mar 2014
Location: Ontario
Posts: 839
LVP is on a distinguished road
Chasing front end vibration after new front brakes. Solved? Slightly long rant...

Brought it in for oil change and front pads/rotors. Prior to this, slight vibration, but tolerable. The 20" Conti DWS tires are on year 7 and shot, so I knew I was just delaying the inevitable, but I was trying to get this season out of them.

Take it home and the front shudder is stupid from 105-135km/h. Talked to the shop and confirmed pads, rotors, oil change, tires on/off, that's it. I have the H&R hub centric spacers, but never any issues.

So, I try a local shop to balance the tires and they said tires too shot. Bit the bullet and tossed new Contis on. Same vibration.

I was north for the week, so I found a place with a road force balancer, calibrated the day before. Balanced, but no major improvement.

Back to the shop to see if anything else loose in the front (thinking a joint, steering joint (I've already done it once) or something).

Shop tried:
- Road test (yep, it vibrates like crap)
- All tires on the balancer. Minor variances, but no smoking gun. He didn't want to re-balance as his machine wasn't calibrated and I've sworn off his machine (I go to proper tire places for balancing).
- Spacers off (yep, still vibrates)
- He had his old 3.0 X5's winters, so he tried those, no spacers (yep, still vibrates)
- Figuring the last thing left was pads/rotors, tossed a new set on, different brand of each (you guessed it - still vibrates). This time though, the right side was cooking hot.
- Tossed on new/rebuilt calipers and vibration nearly gone. I need to get to a better balancing machine to get it back to near perfect again (well, as good as a 350,000km carcass can get ).

So, if you happen to run your pads/rotors to the full end of their life, the pistons are nearly all the way out for a while. Shoving them back in rusty, dirty calipers apparently causes some stickiness and inherent vibrations. First I've had this over my many years of car ownership, so sharing in the hopes it'll help someone else.

I technically could have deferred the $$ new tire set and several balancing attempts. Ugh.
__________________
Daily Drivers:
- 2004 X5 4.4, 01/2004 production, 345,000km
- 2008 535i, 265,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E

Reply With Quote

Sponsored Links

  #2  
Old 07-26-2021, 10:55 PM
EODguy's Avatar
Member
 
Join Date: Jun 2018
Location: Saudi Arabia/Philippines/USA
Posts: 2,184
EODguy is on a distinguished road
Sticking calipers most likely. The X5's get pissy if you lube the pins and will stick.

Don't ask how I know...

Sent from my SM-A730F using Tapatalk
__________________
"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
Reply With Quote
  #3  
Old 07-27-2021, 01:32 PM
Member
 
Join Date: Nov 2018
Location: Canada
Posts: 441
c-bass is on a distinguished road
Quote:
Originally Posted by LVP View Post
Brought it in for oil change and front pads/rotors. Prior to this, slight vibration, but tolerable. The 20" Conti DWS tires are on year 7 and shot, so I knew I was just delaying the inevitable, but I was trying to get this season out of them.

Take it home and the front shudder is stupid from 105-135km/h. Talked to the shop and confirmed pads, rotors, oil change, tires on/off, that's it. I have the H&R hub centric spacers, but never any issues.

So, I try a local shop to balance the tires and they said tires too shot. Bit the bullet and tossed new Contis on. Same vibration.

I was north for the week, so I found a place with a road force balancer, calibrated the day before. Balanced, but no major improvement.

Back to the shop to see if anything else loose in the front (thinking a joint, steering joint (I've already done it once) or something).

Shop tried:
- Road test (yep, it vibrates like crap)
- All tires on the balancer. Minor variances, but no smoking gun. He didn't want to re-balance as his machine wasn't calibrated and I've sworn off his machine (I go to proper tire places for balancing).
- Spacers off (yep, still vibrates)
- He had his old 3.0 X5's winters, so he tried those, no spacers (yep, still vibrates)
- Figuring the last thing left was pads/rotors, tossed a new set on, different brand of each (you guessed it - still vibrates). This time though, the right side was cooking hot.
- Tossed on new/rebuilt calipers and vibration nearly gone. I need to get to a better balancing machine to get it back to near perfect again (well, as good as a 350,000km carcass can get ).

So, if you happen to run your pads/rotors to the full end of their life, the pistons are nearly all the way out for a while. Shoving them back in rusty, dirty calipers apparently causes some stickiness and inherent vibrations. First I've had this over my many years of car ownership, so sharing in the hopes it'll help someone else.

I technically could have deferred the $$ new tire set and several balancing attempts. Ugh.
This is literally me yesterday.

I've been getting a very inconsistent wheel shake. Smooth as butter some times, slight vibration, wobble etc etc

long story short...

About 10km into a 500km round trip I start getting a REALLY noticeable wheel wobble to the point my whole arm was shaking. I make a right turn to pull off the main road and the wife says "smells like something is burning"

Hop out of the car do the ol' touch test and the passenger front rim is HOT.

In my case (and definitive proof I'm an idiot) I was changing the rotors and pads a few months ago, ran into some issues trying to retract the caliper piston, finally got it retracted to the point where I could install the new pads aaaaaand here we are a few months later.

I guess it's a good time to update the Black Bastard thread with more details for anyone that's interested.
Reply With Quote
  #4  
Old 07-28-2021, 07:35 AM
Member
 
Join Date: Jul 2010
Location: Charlotte, NC
Posts: 437
Russianblue is on a distinguished road
Quote:
Originally Posted by LVP View Post
So, if you happen to run your pads/rotors to the full end of their life, the pistons are nearly all the way out for a while. Shoving them back in rusty, dirty calipers apparently causes some stickiness and inherent vibrations. First I've had this over my many years of car ownership, so sharing in the hopes it'll help someone else.
is it recommended to not run your pads past the warning lamp so the pistons don't get extended too far?

what you say makes has some merit I guess but if the rubber boot is not degraded, where does the "rusty, dirty" come into play re: the piston?

I'm not contradicting, just curious mostly. I too have had to replace a sticking caliper and have dealt with all manner of wheel wobble on all four Bimmers I've owned. It's one of the more annoying problems to have because it undermines directly one of the (if not THE single greatest) advantages of driving a BMW - the rock solid, plugged in, front end suspension, steering and and braking experience. I think they should call it "The Ultimate Driving Experience" ; )
__________________

2005 X5 3.0 - 71k mi (9.2018) -> 81k 9.19 -> 97k 6.21
2003 X5 3.0 - 177k mi (9.2018) -> 186k 9.19 -> 202k 6.21
1988 528e w/ Bullseye s256 / MS2 Extra / GC Coilovers / Yukon Coils ~ 300+ HP - SOLD
Reply With Quote
  #5  
Old 07-30-2021, 10:02 AM
Member
 
Join Date: Nov 2018
Location: Canada
Posts: 441
c-bass is on a distinguished road
Quote:
Originally Posted by Russianblue View Post
is it recommended to not run your pads past the warning lamp so the pistons don't get extended too far?

what you say makes has some merit I guess but if the rubber boot is not degraded, where does the "rusty, dirty" come into play re: the piston?

I'm not contradicting, just curious mostly. I too have had to replace a sticking caliper and have dealt with all manner of wheel wobble on all four Bimmers I've owned. It's one of the more annoying problems to have because it undermines directly one of the (if not THE single greatest) advantages of driving a BMW - the rock solid, plugged in, front end suspension, steering and and braking experience. I think they should call it "The Ultimate Driving Experience" ; )
The boot on the caliper that I removed it from was in good condition and seated properly.

I think what happens is the heating and cooling from the normal operation of your brake system creates condensation inside the rubber boot and over time forms enough rust that it causes issues with the piston fully retracting.
Reply With Quote
  #6  
Old 07-31-2021, 12:36 PM
Member
 
Join Date: Jul 2016
Location: Menlo Park, CA
Posts: 1,797
Fifty150hs is on a distinguished road
Quote:
Originally Posted by c-bass View Post
The boot on the caliper that I removed it from was in good condition and seated properly.

I think what happens is the heating and cooling from the normal operation of your brake system creates condensation inside the rubber boot and over time forms enough rust that it causes issues with the piston fully retracting.
That is possible. I rebuilt a set of brakes and when I pulled them apart a couple of the pistons had pitting. That only comes from water, and the boots were not cracked, so the theory makes sense.
Reply With Quote
  #7  
Old 08-11-2021, 05:39 PM
LVP LVP is offline
Member
 
Join Date: Mar 2014
Location: Ontario
Posts: 839
LVP is on a distinguished road
The calipers helped, but after exhaustive balancing there is still a vibration. Going to toss on my winters to rule out tires. If not the new tires, then it's a joint somewhere in the front, or the rack or the u-joint on the steering shaft (I replaced it about 170,000km ago). Fun.
__________________
Daily Drivers:
- 2004 X5 4.4, 01/2004 production, 345,000km
- 2008 535i, 265,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 07:38 PM.
vBulletin, Copyright 2021, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.