Thanks for the reply but I don't think that is the problem. I used a c-clamp and a socket to push the caliper pistons all the way down when I tried to install the brake pads - they slipped in sort of tight. So, there is no play for the caliper pistons to be able to relieve the pressure on brake pads.

What I can't understand is that the opposite side worked just fine and there was plenty of room to slip the brakes pads in with no problem.

Thanks for the info.. All info is useful at some time or another.

Dave