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Thread: Wide L SWB brake caliper piston problems

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  1. 02-27-2020, 01:05 PM #1
    91167coupe
    91167coupe is offline
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    Wide L SWB brake caliper piston problems

    I am changing gaskets and seals in my wide L rear calipers for vented rotor (67-68S/L) with the 38mm pistons.
    Problem is when I put the pistons back in the caliper the inside tube is too tight for the pin inside the cylinder? I have now taken the small tube out of piston and it does not go on the pin with normal Power used. When dismounting I used air to blow the pistons out.
    The calipers have been renovated before I bought them but when I turned the pistons for correct angle they destroyed the sealing ring so brake fluid flushed out of calipers (all four pistons).
    Could I bore up the hole in tube in piston so it moves freely on pin in cylinder?

    On picture, the screwdriver point on the tube which goes inside the piston.

    Any body experienced the same problem?
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    X: 67 911 Coupe + 67S Targa, 912, 924, 944, 928, 356
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