One final water pump misery story. when I did my head gasket timing belt I also did the water pump (3 times) and it leaked. Turned out the heater pipe bracket and metal tube was pried out a little forward of the front of the block so when I installed the waterpump it did not mate flush with the block and water oozed out. I had to push the hard pipe backwards toward the firewall and then no leaks. I think when I pried the exhaust manifold off the head to remove the head I must have inadvertantly used the metal pipe for leverage shifting it 1/2- 3/4 inch on its bracket. I had thought the leak was a bad oring, a bad tube bushing seal, etc. Nope. Just a heater tube out of alignment. Take care not to bend the bracket as someone has noted