Reply to "Leaking Caliper Piston"

bosswrenchMember

Bob, I found that almost ALL Euro cars from the '70s and '80s (Cobra, Ferrari, Pantera, Porsche etc) use nickel plated mild steel pistons instead of stainless like in U.S cars since the '80s. The pistons are magnetic. So the plating sometimes pits like a rusty bumper and will tear up new seals no matter how carefully you install them. If that's your problem, the fix is new pistons if possible or unpitted-used if new are unavailable.

Your calipers are English 4-piston Girlings and are no longer sold by Girling after 45 years. No known cross-reference. Someone in Europe advertised new pistons F/S at one time. I made some on a lathe out of stainless bar stock for my ATS rear calipers- also were unavailable. Mustang calipers aren't in the same league and will not bolt on.

8/22/1510:25 PM

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