Uintah Machine changes out nozzle blocks when required to do so. The photos shown here depict jobs on a couple of different Westinghouse turbines. The general procedure is to remove the old bolts (shearing the retaining pins in the process), remove the nozzle blocks, then machine the interface with the nozzle chambers. Thereafter the new blocks are lapped in to contact with the nozzle chambers, bolted up, and the bolt heads pinned.