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Rear brake calipers (98 S70) S70 1998

posted by  Gentleman on  Tue Aug 3 03:30 CST 2004
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last visit: Sun Jun 8 14:54 CST 2014
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I own a 98 S70 with 147,000 Kms (90,000 miles) on it and I'm having a problem with the rear brake calipers. It seems I am only getting one year or 12,000 miles out of a set of rear calipers before the pistons seize. I know the pistons have seized as the rotors get heavily rusted.

At $200 a caliper every year, this is going to bleed me dry.

Is anyone else having problems with their rear brake calipers on their S70?

What should be the normal lifespan of rear brake calipers on an S70?

Thanks.








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    Rear brake calipers (98 S70) S70 1998

    posted by  jda2000 on  Tue Aug 3 03:51 CST 2004
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    last visit: Sun Jan 1 21:27 CST 2012
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    where do you live?. I bet you live in the rust belt area, where lots of salt is used on the roads during the winter.

    Learn how to do brake jobs in your car, remove and lubricate the caliper pins with high temp brake grease twice a year, before winter season and after the season is done.

    Your calipers won't seize and will last a long time
    --
    '88 240, '92 745, '98 v70 John, Tampa Bay








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      Rear brake calipers (98 S70) S70 1998

      posted by  Gentleman on  Tue Aug 3 04:03 CST 2004
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      last visit: Sun Jun 8 14:54 CST 2014
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      John:

      It's not the disk brake pads seizing on the pins, it's the internal pistons that get stuck.

      Yes, I live in Ontario Canada where lots of salt is put on the roads here in the winter months. But my old Volvo 240 calipers lasted an average of 4-5 years (80,000 miles) before needing replacement. What gives with this S70?








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        Rear brake calipers (98 S70) S70 1998

        posted by  someone claiming to be n0v8or on  Wed Aug 4 01:58 CST 2004 [RELATED]

        You mentioned the rotor braking surfaces are rust coated, which suggests to me that the rear brakes are not being applied as a consequence of the caliper piston not moving.
        When was the last time the brake system was flushed and the brake fluid replaced? Is this car not driven for long periods of time? Brake fliud absorbs moisture over time. If the brakes are not used for awhile, water suspended in the fluid can corrode the piston and caliper bore together. There would have to be a lot of corrosion to seize a caliper piston, as they can exert enough force to lift the entire car (the cylinder in a floor jack is not much larger). More typically, corroded pistons seize with the brakes applied, leading to rapid pad and rotor wear.







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