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Old 03-09-2011, 06:32 AM
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oil around brake pads...

just noticed yesterday when i was leaving work there there is a little bit of oil around my rear passenger side brake pads. anybody know what this could be from??
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Old 03-09-2011, 06:45 AM
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Re: oil around brake pads...

Most probably brake fluid. Check the lines/hoses and check under the dust cover of the brake piston for any fluid.
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Old 03-09-2011, 02:09 PM
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Re: oil around brake pads...

Most likely brake fluid, like frango said, check the brake lines and caliper for the source of the leak.

However, if it is a heavy oil with a rotten egg smell to it then its gear oil leaking out of the end of the axle shaft seal. Had this happen on my old ZJ, was all ready to replace the brakes and after taking the wheel and drum off I found the real source of the leak.

Brakes are the more likely option though, check them first.
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Old 03-09-2011, 02:16 PM
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Re: oil around brake pads...

poke your head under the car (from the rear)... look at the brake backing plates. If either one is coated, that is your problem. The axle seals are decently common on the wj.

Also very well could be brake fluid, but if your leaving trace of it, its not going to be a small leak and you would already be feeling poor braking due to lack of fluid. Also if you were not out of brake fluid in that circuit you would feel a sinking pedal when you applied the brakes.
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Old 03-09-2011, 06:52 PM
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Re: oil around brake pads...

might have to replace the rear axle seals. i have the same problem on mine

http://www.jpmagazine.com/featuredve.../photo_14.html
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Old 03-11-2011, 07:17 AM
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Re: oil around brake pads...

no rotten egg smell..might just be brake fluid...gonna clean it up this weekend
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Old 03-11-2011, 03:26 PM
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Re: oil around brake pads...

btw, i have regularly heard the diff lube and lsd additive refered to as having a "rotten egg" smell. Personally I dont think it does, its not a great smell but hardly rotten egg.

viscosity will be a big factor if its thick and slimy and takes soap or clothes to wipe it on to get it off your fingers its diff lube, if it will wash off with water and its thin and watery between your fingers (rubbing thumb and index together), its going to be brake fluid.

Again, it VERY well could be brake fluid, but especially by now almost a week later if your leaving drips on the ground your master cylinder has got to be low or empty by now. pop your hood and check the level. If your low (like below min) its likely brake fluid.

edit: on odds alone I would lean towards axle seal as the link posted with their jeep with 100k or less the seals were alread dumping. Axle seals on a wj are VERY common, leaking brake fluid from a caliper... not so much... BUT possible none the less.
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Old 03-12-2011, 12:13 PM
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Re: oil around brake pads...

I just had the same issue with mine. 2001 wj with 85,000 miles. I had them replace both rear axle seals it cost me around $500

Scott
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Old 03-12-2011, 04:38 PM
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Re: oil around brake pads...

I recently discovered that mine is leaking at the left rear axle seal. Aslo have a leak at back of the front diff. Anyone tackle this on their own?
Seems like a job for the pros...
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Old 03-12-2011, 08:38 PM
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Re: oil around brake pads...

geez 500$. I had my rear axle seal done last november. my uncles friend did it. ran me like 150...
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Old 03-14-2011, 11:38 AM
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Re: oil around brake pads...

Yeah $500 was a little steep for both rear seals plus differential seal and refill. Pays to know someone for sure! Usually I do everything myself but this seemed like a harder job then I thought with the axle having to be released from the differential to replace the seals

Scott
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Old 03-16-2011, 01:41 PM
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Re: oil around brake pads...

Quote:
Originally Posted by Sskafar View Post
I just had the same issue with mine. 2001 wj with 85,000 miles. I had them replace both rear axle seals it cost me around $500

Scott
Did you have the job done at the stealer? I had mine done at a local shop and they replaced the brake pads, turned the rotors and left the parking brake shoes as they were after cleaning them with brake cleaner. Total price was $440.
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