Destroyed brake caliper piston (1 Viewer)

Joined
Oct 14, 2020
Messages
110
Location
Charlotte, NC
I did some brake-work on Dobbie today. It all went well until I got to the right rear (last stop). I could not get the caliper off for the longest time. When I finally got the caliper off, the pictures below shows the condition of the piston. There's the catch. The brake pads were in really good condition, so it had to look this way before the pads were replaced. Had I not put new rotors on, I would not have known.

Question. HOW? I can't see any way for this to happen with the brake pads in. Even if one brake pad disappeared and the piston pushed against the rotor, the rotor would have had deep scarring. It didn't.

Another question. Who just puts this back on?

Caliper Top.jpg
Caliper side.jpg
 
Joined
Jul 25, 2019
Messages
618
Location
Maine
It was probably contacting a rotor earlier in life. Honestly it doesn't really effect caliper function, however my own ocd would have me turning the piston on my lathe or just replacing caliper.
 
Joined
Dec 10, 2007
Messages
7,626
I would replace both rear calipers so you know you have a good pair working together. If the pad on that side was less worn than the other it suggests that the piston was stuck.
 
Joined
Dec 8, 2006
Messages
9,844
Location
New Jersey
Calipers can be rebuilt using all OEM parts. A new OEM rear piston is around $20.
No need to replace the calipers unless they are physically damaged or badly corroded on the inside.
 

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