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#1
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Sigh . . . . Left Front Brake sticking . . .again
Brake sticking started happening Feb 2018. I replaced caliper with a remanufactured BMW caliper and that’s including the carrier bracket. Today, July 20, 2018, sticking again. I measured the left side 260F and right side is only 107F. The side that is having problem, the rim is too hot to touch. The other three corners are fine. It is only the left front having the issue. Plan: I will be replacing the rotors and pads with a better brand this time (I used Centric) and will be bleeding and changing the brake hose again. P.S. X5 is driven 90 miles / day all HWY driving. Current rotors/pads setup has 17K on it. Just Venting . . . |
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#2
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I'd replace the brake hose.
They can collapse internally preventing fluid from exiting the caliper when the seal contracts the piston.
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12 E70 3.5i xDrive 03 E46 330i ZHP 01 E53 3.0i 98 E36 323is 12 Audi A4 Quattro 79 Triumph Spitfire 73 MGB |
#3
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I've done a few brake jobs recently. Several had very crusty guide pins. You may just need to clean things up. The hose worth looking into at the same time.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#4
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Are you greasing the guide pins? BMW advise installing the guide pin DRY. If the guide pins are rusty, the rubber boot has been compromised. You need to replace the rubber boot and guide pins.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#5
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Sigh . . . . Left Front Brake sticking . . .again
Not greasing per se. Just cleaning /polish. (Spin in a drill/ green scrubbie with some oil). Wipe clean but don't degrease. Just the slightest wd-40 to keep from rusting not enough to collect dust.
It was a Volvo that had the rust pins. My X5 just was not perfectly clean so I polished them. Correct on if they are rusty boot needs replacement.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#6
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I had same issue - replaced sticking caliper with "re-manufactured" (and new rubber hose) and exactly the same issue - was getting SO much hotter and wearing out the pad faster than the other side.
I replaced it with NEW BMW caliper and rebuilt the other 3 . There is a theory that once a caliper gets "cooked" its shot - I think thats true
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2004, X5, 3.0, 202k+ |
#7
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- I usually rebuild the caliper myself using new boot and seal (ATE or FTE).
- Brake Hose: yes replace them (use only ATE or FTE etc.). - Guide pin: clean with steel wool: Honda says grease it, BMW says do not. Who cares, just clean it and apply a tiny bit of grease. It gets dirty anyway with road debris etc. Once every 3-4y, clean the guide pins.
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1998 E39 528i 5sp MT 2006 E53 X5 3.0 6sp MT |
#8
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My front passenger caliper was sticking and caused uneven wear between the front driver and passenger pads about two years ago. What I did was rebuild my caliper using new boot and seals and did a complete brake fluid flush. Try that and make sure your guide pins are clean and see if that helps. If problem still persists then you may need a new brake hose.
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Main Autos: 1990 BMW 525i 2004 BMW X5 4.4i 2011 Toyota Tacoma Pre-Runner V6 |
#9
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All,
I appreciate all the tips/comments provided. I finally had a chance to look into this problem this past weekend. I removed the caliper and saw the rubber boot that protects the piston came off a little bit (maybe an inch). Who knows it could be the cause of the problem. I got a warranty replacement from Autozone and got a brand new (remanufactured) caliper again at no cost.
So far so good after about 100miles. I will continue to monitor using infrared thermometer and temperature seems to be staying around 160F (front) after a long drive. Only time will tell. Here is a pix of the remanufactured caliper: |
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