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XJ550H Brake Caliper Piston- Toast, or Serviceable?

Discussion in 'XJ Technical Chat' started by XJ550FirstTimeBuilder, Nov 21, 2020.

  1. XJ550FirstTimeBuilder

    XJ550FirstTimeBuilder New Member

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    Hey all,

    I'm in the process of rebuilding my front brake, gonna be putting in a huge order with Len at the start of the new year (creating a parts list for everything i need is... man oh man PO's are a pain ). In cleaning/disassembling my brake caliper, i noticed a couple dents/scratches in it. Can anyone tell me if any of these are supposed to be there, or if the piston is still serviceable? I'm a student, so I'd prefer to not have to spend the additional money getting a caliper piston, but if i gotta i gotta.

    Thanks in advance! 20201121_135534.jpg
     

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  2. Minimutly

    Minimutly Active Member

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    Looks good to me!
     
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  3. Toomanybikes

    Toomanybikes Well-Known Member

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    The 2 marks on top should not be a problem as they are outside the seal, but the lower one might be a leak point. B5BAC46A-70EF-41A7-9045-6999096AB08D.jpeg
     
  4. XJ550FirstTimeBuilder

    XJ550FirstTimeBuilder New Member

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    Toomanybikes, that lower one is just a grease spot that i rubbed off with my thumb just now :) i didn't get around to cleaning the piston, since i wanted to be sure it'd work first.

    Minimutly, thanks for the input!! Seems like i should be good to take out the old caliper seals and get everything clean.

    Thanks again!!
     
  5. XJ550FirstTimeBuilder

    XJ550FirstTimeBuilder New Member

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    Oh, i actually do have another issue with it; are the scratches on the piston face where it contacts the pads an issue?
     
  6. Franz

    Franz Well-Known Member

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    No.
     
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  7. Jetfixer

    Jetfixer Well-Known Member

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    Good to go !
     
  8. XJ550FirstTimeBuilder

    XJ550FirstTimeBuilder New Member

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    Oh man, that's great to hear. Thanks everyone!!
     
  9. a100man

    a100man Well-Known Member

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    Blimey, that's almost mint - you should see mine pits filled with epoxy!
     
  10. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    Nope— the lip of the piston is gonna be against the metal backing of the pad.
     

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