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#1
06-09-2013, 01:01 AM
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Rear brake caliper replacement mistake, low, spongy pedal
This is a frequent SAFETY issue that comes to me.
******************************** One of the most COMMON mistakes when replacing the rear brake caliper is.... Putting them on the WRONG side, this places the caliper bleed screw on the BOTTOM, the most intensive bleeding will at best give a spongy (low) brake pedal... The caliper BLEED screw MUST be at the TOP !!! This is not neurosurgery or rocket science!!! If your eyes work, and you have ever watched BUBBLES rise in a glass of soda... The caliper BLEED screw MUST be at the TOP !!! Because of basic physics AIR rises in brake fluid. The caliper BLEED screw MUST be at the TOP !!! Discussion is FUTILE, the law of Physics already won... When in doubt, consult the FOUR rules... #1. The caliper BLEED screw MUST be at the TOP !!! #2. The caliper BLEED screw MUST be at the TOP !!! #3. The caliper BLEED screw MUST be at the TOP !!! #4. The caliper BLEED screw MUST be at the TOP !!! .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ 
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#4
06-09-2013, 03:38 PM
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Good advice. Seen this issue on the front of a GM product once- As a labor saving move, they can be reverse bled but the better method is to put them one right in the first place.
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#5
06-09-2013, 06:48 PM
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haha - I have seen this once a long time ago at a neighbors house who was trying to bleed his upside down calipers
 . I was once stuck with my VW Golf once with a bad caliper on one side and the wrong side spare part only available and nothing to be found in the 500 mile radius in the middle of nowhere.I removed and propped the caliper right side up, lodged a piece of wood to lock the piston - bled it with a coffee can and vinyl tube. Install the caliper back upside down after bleeding and completed my journey.
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2012 BMW X5 (Beef + Granite suspension model) 1995 E300D - The original humming machine (consumed by Flood 2017) 2000 E320 - The evolution (consumed by flood 2017)
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#6
06-09-2013, 11:02 PM
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I'm a big fan of Jeep calipers - the hose and bleeder screws are interchangeable.
The right and left calipers are identical, you just install the bleeder where it needs to b=go based on the side 
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment Last edited by whunter; 06-25-2013 at 12:06 AM. Reason: spelling
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