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Thread: Wide L SWB brake caliper piston problems

  1. 02-27-2020, 01:04 PM #1
    91167coupe
    91167coupe is offline
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    Wide L SWB brake caliper piston problems

    I am changing ganskets and seal 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 loves freely on pin in cylinder?

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

    Any body experienced the same problem?
    Attached Images Attached Images   
    '67 911S Sunroof, Polo Red(Project disguised as a G-model)
    '67 912 Sunroof, Light Ivory(Alive and kickin')
    '67 912 SWTarga, Signal Red(Project in the making)
    X: 67 911 Coupe + 67S Targa, 912, 924, 944, 928, 356
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  2. 06-05-2020, 03:53 PM #2
    Jim Breazeale
    Jim Breazeale is offline
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    Your problem is not with the "pin", it is with correct alignment of the piston and the the hole is goes in. Just keep trying and you will get it right. If it just won't move you have a bound up piston and should start over. You can't do this without using a C clamp or a large pair of Channel lock pliers. Sorry for the late reply. I'm hoping you found out what I was saying long before I said it.

    Regards

    Jim
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  3. 06-05-2020, 10:34 PM #3
    91167coupe
    91167coupe is offline
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    Thanks Jim
    I got the pistons in, but had to press them. I will soon now gave the car on wheels and will check the brakes for function.
    '67 911S Sunroof, Polo Red(Project disguised as a G-model)
    '67 912 Sunroof, Light Ivory(Alive and kickin')
    '67 912 SWTarga, Signal Red(Project in the making)
    X: 67 911 Coupe + 67S Targa, 912, 924, 944, 928, 356
    Reply With Quote Reply With Quote
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