|
Xoutpost server transfer and maintenance is occurring.... |
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management |
|
LinkBack | Thread Tools | Display Modes |
#1
|
||||
|
||||
And another brake issue
I’m going to pull the wheels today and recheck all the brake work I did over the past few months (new front rotors and pads, new parking brake pads and springs), and check all the fasteners on the suspension pieces/links (all changed last year). Beyond shoddy workmanship by me and missing the torque on something bake or wheel related, or a blown out bushing (which seems unlikely with only 6k on the new links) the only other thing I can think of is a very badly warped rotor, except that they are brand new from FCP and the car just took me 2000 miles and back to hunt with zero issues a few weeks ago. All the suspension bolts are witness marked so they should be easy to verify. What else is there I should check? Could a caliper cause this if it fails? I would think the car would pull to one side though if this were the case. Thanks for any thoughts before I get into it gents.
__________________
Current Original owner 2002 E53 X5 4.4i to 4.6i swap 1993 Mopar 318 Jeep Grand Cherokee - original owner 2015 V6 Jeep Grand Cherokee - the nice car for my wife Former 1972 Audi Fox 1986 Saab 900S 1996 BMW Z3 1998 BMW E36 M3 Sedan 2004 BMW E46 M3 2006 Audi A3 Quatro |
Sponsored Links | |
|
#2
|
|||
|
|||
Check the thrust arm bolts. The inner ones!
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20) |
#3
|
||||
|
||||
Put it up in the air today and checked every bolt and nut on the suspension and calipers. All were torqued ok. Pic below is of the rust in 1/3 of the rotors, after I hit it with a scotch bright.
Clearly the pad isn’t hitting that area. I Put it all back together and suddenly no wobble. Crazy, because I didn’t really do anything.
__________________
Current Original owner 2002 E53 X5 4.4i to 4.6i swap 1993 Mopar 318 Jeep Grand Cherokee - original owner 2015 V6 Jeep Grand Cherokee - the nice car for my wife Former 1972 Audi Fox 1986 Saab 900S 1996 BMW Z3 1998 BMW E36 M3 Sedan 2004 BMW E46 M3 2006 Audi A3 Quatro Last edited by Henn28; 01-05-2023 at 06:25 PM. |
#4
|
|||
|
|||
Wow, it's a big area not to be touched by the pad. Were pads flat? I would suspect the vibration was cause by such a big none touching area.
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20) |
#5
|
||||
|
||||
They seemed fine when I installed them. New TRD ceramic pads, sold as a kit (FCP) with Zimmerman rotors. After I put it back together this morning I took it out and hammered the brakes. Up to 60 a few times and jumped on the binders, just like the TRW break in instructions that I followed a few weeks ago. That cleaned the rust off that wouldn’t clean up with the scotch brite.
Who knows….one of the more strange x5 happenings I’ve experienced in 20+ years of owning the car. FCP tech support is supposed to get back to me with their thoughts, and hopefully a new rotor!
__________________
Current Original owner 2002 E53 X5 4.4i to 4.6i swap 1993 Mopar 318 Jeep Grand Cherokee - original owner 2015 V6 Jeep Grand Cherokee - the nice car for my wife Former 1972 Audi Fox 1986 Saab 900S 1996 BMW Z3 1998 BMW E36 M3 Sedan 2004 BMW E46 M3 2006 Audi A3 Quatro |
#6
|
|||
|
|||
The pads couldn't have caused this... almost sounds like the rotor came loose and got cocked slightly sideways. Never heard of something like that happening but also never heard of this kind of problem before. Super weird!!!
__________________
2003 3.0 5MT Topasblau Purchased in 2016 and surprisingly still running |
#7
|
|||
|
|||
Hmmm, that picture was taken after driving it or after it sat for a while? it almost looks like the shape of that rust spot mimics the shape of the caliper.
In any case, brake vibration can also be caused by uneven pad material transfer to the rotor. Maybe you cleaned off a high spot and that was it. Also, I've had that same jack since 2006 and I recently bought the same one brand new to have as an extra. Stout little thing!
__________________
__________________ 2006 X5 4.8is |
#8
|
||||
|
||||
Quote:
After checking the torques, I drove it and essentially did the pad/rotor break in again. Up to 60, jump on the binders to 10 mph or so, rinse/repeat a several times. No shimmy or wobble at all. I don't think I took off too much of the rust, but maybe it was enough. Assuming the built up rust was causing the wheel to wobble under braking, which was then coming up the steering column. That jack is super old and I have been thinking I need a new one. Its been a champ though. Although I've been eyeballing an aluminum higher lift one. I need to put a few blocks under it to get my X5 up enough to get the wheels off. Aluminum would be easier too for me to lug back to my shed after use. Read: I might actually lug it back to my shed instead of leaving it outside like my current one!
__________________
Current Original owner 2002 E53 X5 4.4i to 4.6i swap 1993 Mopar 318 Jeep Grand Cherokee - original owner 2015 V6 Jeep Grand Cherokee - the nice car for my wife Former 1972 Audi Fox 1986 Saab 900S 1996 BMW Z3 1998 BMW E36 M3 Sedan 2004 BMW E46 M3 2006 Audi A3 Quatro |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|
|