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Old 10-26-2011, 08:01 AM
vstech's Avatar
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anybody seen a caliper leak out the piston?

I've been chasing a fluid leak in my brakes on the 87wagon. I could find ZERO evidence of lines or external leaks, but it was a very slow leak, so could have been burning off while I drive, anyway, pulled the MC, dry in the booster, put a newer MC on, no change. finally started pulling things apart, and hooked up the power bleeder, pumped up to 15, and started looking for the outlay... found it on the right rear caliper. seeping out around the piston. obviously I have to pull it, I've got a 95 wagon to upgrade to vented rears anyway...
just wondering...
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Old 10-26-2011, 08:22 AM
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I had on my 420sel leak at the seals around the piston.
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Old 10-26-2011, 08:35 AM
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Quote:
Originally Posted by vstech View Post
just wondering...
You are wondering if it's possible for a seal to leak? Happens frequently.
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Old 10-26-2011, 10:43 AM
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Quote:
Originally Posted by tangofox007 View Post
You are wondering if it's possible for a seal to leak? Happens frequently.
Yes, I had two happen in a year.



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Old 10-26-2011, 12:07 PM
vstech's Avatar
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no, obviously I know they can leak, just wondering how often this occurs, I've NEVER seen one leak this way. I've seen seized pistons, blown flex lines, blown drum brake slaves, rusted hard lines, and bad MC's dump fluid... never seen a caliper piston let go. well, before now that is...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #6  
Old 10-26-2011, 01:30 PM
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Seems it'd be like a master cylinder seal failing when you push the pedal to the floor. Years of replacing pads when the dealer says to; i.e., lots of life left, then letting the pad wear to the rivets exposes the seal to a section of piston that's corroded from fluid that hasn't been changed in a while. You're right, this scenario means caliper seals would leak all the time.

Sixto
87 300D
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