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On 20 Oct 2004 at 15:19, John Hilgers wrote: > I will take out the pads and measure the piston. You really can't measure the piston without rebuilding the caliper. The piston has a step in it, so that the part you can see is smaller than the actual piston diameter. If your pistons are full round at the face, no cutouts, then there's no way I know of to be sure of the diameter without taking it apart. If the pistons have the little triangular retaining plates that look just like the ones in the Bentley photos, then there's a very good chance that they are 42mm. The smaller type 1 calipers used a retaining plate that looks completely different. Unfortunately the latest calipers with the full circle piston faces don't use any retaining plates at all. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~