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  #1  
Old 08-02-2009, 11:31 PM
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Test your brakes after brake work...

I know it goes without saying, but...

Replaced my front calipers + pads this weekend with Cardone rebuilds from Worldpac. Finished the job, bled system, took a test drove on back roads. Came back to the house before going on the highway for the 'high speed' test. Pushed the pedal down when stopped as hard as I could...and pop, pedal went to the floor.

The driver's side caliper blew out, fluid was running down it

Glad I didn't find that out on the highway.

Hope this helps someone...
dd

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  #2  
Old 08-02-2009, 11:46 PM
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Yep, that is a good warning. I did the brakes on my 85 and am now doing the brakes on my 84. No problems on the 85 so far. New pads and rotors there and bled the brakes. The 84 (Rufus) will need new rotors and pads as well. The bleeding should go a lot better as I kind of have that down now.

So what can blow out on a caliper? The hose? A cylinder inside?
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  #3  
Old 08-02-2009, 11:59 PM
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I always drive around my block a few times and do a couple hard stops to make sure everything is working correctly.
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Old 08-03-2009, 12:01 AM
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I'm very interested in hearing what broke in the caliper - definitely not the hose? I've heard very good things about Cardone rebuilds, used to sell them when I was in parts, and I have 4 rebuilt cardones on my 300SD
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  #5  
Old 08-03-2009, 12:25 AM
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I will take pics when I remove the caliper.

FWIW, Im not saying the Cardone's are bad...Ill put in another confidently. No rebuild process is infallible.
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  #6  
Old 08-03-2009, 01:34 AM
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I used "NuGeon" rebuilt calipers when I re-did the rear brakes on my SD.....they are rebuilt in CA.
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  #7  
Old 08-03-2009, 07:55 AM
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Quote:
Originally Posted by dieseldan44 View Post
I will take pics when I remove the caliper.

FWIW, Im not saying the Cardone's are bad...Ill put in another confidently. No rebuild process is infallible.
Very true, but one failure to a brake caliper and it could mean a lost life so only a 0% failure rate is acceptable on these parts IMO
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  #8  
Old 08-03-2009, 08:02 AM
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After ANY brake work, the last thing (you hope) that you do before putting the car back into service is to stand on the pedal with BOTH FEET while the vehicle is parked! If something is going to turn loose, you want it to happen at that time, not while going 80 down the freeway.
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  #9  
Old 08-03-2009, 08:18 AM
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The emergency brake should still work.
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  #10  
Old 08-03-2009, 09:26 AM
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So should your dual circuit braking system.
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Old 08-03-2009, 09:49 AM
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And if you're ever on the highway down shifting on a manual and automatic does slow your car down considerably. Put your emergancy lights on and pray!
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Old 08-03-2009, 09:53 AM
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I generally do some hard braking, forward and reverse in the driveway, then around the block. after I return I hit all four rotors with an IR gun, looking for any that are much hotter. saved my bacon on a stuck rear rotor that I caught with the IR gun
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Old 08-03-2009, 10:33 AM
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... I see a list of new calipers, and pads... I don't see new flex hoses in that list of parts changed... were your hoses new at the time already?
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  #14  
Old 08-03-2009, 12:58 PM
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Too thin of pads and rotor will result in a caliper piston that travels further than it's length. Which is why there are minimum thickness listings for both. But with new pads, not sure if that was your problem.
Glad to hear of a "simple" failure.
I would think a rubber hose failure would result in no brakes vs. pushing the piston too far, but that's a good point.
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  #15  
Old 08-03-2009, 01:11 PM
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Quote:
Originally Posted by toomany MBZ View Post
Too thin of pads and rotor will result in a caliper piston that travels further than it's length. Which is why there are minimum thickness listings for both. But with new pads, not sure if that was your problem.
Glad to hear of a "simple" failure.
I would think a rubber hose failure would result in no brakes vs. pushing the piston too far, but that's a good point.
vstech and toomany - good points.

I didnt flat out put in the description initially, but I installed new flex hoses during the job and the rotors are still 12mm thick and not warped (service limit is around 10mm).

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'83 300TD Cali Wagon 210k, wife's car
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