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I know they are late calipers, because I purchased a set of new early ones, only to discover that the previous owner put the later ones on this car when he converted it to disc brakes. These calipers were purchased from the same retailer (Painters Grinding) in Denver, as the early ones. They had to special order them as they rarely get calls for the late calipers. They look brand new, but were marked rebuilt. If I switch the calipers from the left to the right, then both will have the bleeder valves on top. I don't think the caliper with a single bleeder valve has a location for the second valve, but I will check. Doug > -----Original Message----- > From: Jim Adney [SMTP:jadney@vwtype3.org] > Sent: Monday, July 14, 2003 1:22 PM > To: type3@vwtype3.org > Subject: RE: [T3] Brake problems > > On 14 Jul 2003 at 12:51, gray, douglas wrote: > > > The left caliper has both top and bottom valves, and the passenger has > only > > one valve. So both calipers should have the bleeder valves on top? > > Both calipers should have bleed valves on top. Bleeding from the bottom of > the > caliper will leave a large air pocket in the caliper which will prevent > pressure buildup. In addition, if these are actually old rebuilt calipers, > then > the pistons have a cutout in them which should be facing in a particular > direction, somewhat downward, so they really have to be done correctly. > > If these are really the late, 72-3, calipers then each of them originally > had 2 > bleed valves, so one of yours must be broken off. You can either rebuild > them > so that they are right, with the bleed valves on top, or send that one to > me to > get the bleed valve replaced. > > If this caliper really has just one bleed valve, then these are the early > calipers, MOST of which had just one bleed valve. ALL late calipers came > with > dual bleed valves. > > You can only mount the late calipers on late, 72-3, steering knuckles. Are > you > sure you have late calipers? > > -- > Jim Adney > jadney@vwtype3.org > Madison, WI 53711-3054 > USA > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org