C32 AMG, C55 AMG (W203) 2001 - 2007

C55 Front Caliper Pins Backing Out

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Old 01-26-2013, 12:34 AM
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C55 Front Caliper Pins Backing Out

Okay, so this week my car starting giving me a weird scraping noise from the drivers side. Increasing in pace as the speed grew, but oddly not quieting once I hit the brakes. Sometimes the sound would change with brake application, but it would never silence. Too shrill to be a wheel bearing and there wasn't any noticeable drag on the wheel. I was at a loss, and with a busy week at the firm, I had to wait until tonight to get the wheel off for a look.

I saw that both of the caliper pins had backed out. One was completely out of its hole and barely held in by the retention clip along the side of the pads! (hope you can visualize-I should have taken a pic) I know that I knocked them home completely because I am very careful with my maintence- anyone else have these back out on them?
Old 01-26-2013, 01:20 PM
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Thats crazy!!! How long ago did you do your brake job? I'd put in an order for new pins and a retention clip for the fronts. Can't cost too much and better safe than sorry.
Old 01-26-2013, 02:21 PM
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Yeah probably should get new pins and retention clips. These rarely ever back out
Old 01-26-2013, 05:42 PM
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Yeah, I think I will do that. Blew my mind- combination of relief that it wasn't something expensive & fear that it was happening right under my nose. The brake change was only about 3 mo ago-New rotors & pads. Take care guys!
Old 01-26-2013, 08:38 PM
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Considering you have to beat the pins in with a hammer either the pins must be too small or the caliper hole is too big. Start with the pins.
Old 01-27-2013, 02:09 AM
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or they didn't beat them in, they only hand pushed them in
Old 01-27-2013, 10:02 AM
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I "tap" mine in using a punch set and a small hammer.

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Old 01-27-2013, 02:14 PM
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Yeah, the punch set is extra handy for this. I did the brake job sans bourbon and made a special point of tapping them all the way in- I'll pick up another set of pins for sure!

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