Quote:
Originally Posted by Tim Corcoran
Have you ever cut the thrust register for new caps on a Pontiac engine? My machinist does not have a cutter that can be used to cut the thrust register with the caps installed installed using a line hone. He used a fly cutter on a milling machine. Getting the new cap cut to match up with the block is the difficult part. You could have the thickness correct and be way off from the block. Once you have one side cut to match the block then all you need to do is cut the other side to the correct thickness, better to measure the thrust register on the block or the old factory 2 bolt cap than to measure the bearing. The new cap needs to match up the the register on the block.
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Tim, it doesn’t matter what marque the block is; the process is the same. I have cut the thrusts on aftermarket Ford SVO blocks. A fly cutter will work; you just have to make certain that ALL the facets of cutting the thrust are taken into account. In a couple of instances we bolted the new “thrust” cap in its position after confirming that it was in the correct position, then used a fly cutter in one of our F90 Rottler machining centers to make the initial cuts. Once the first side was completed, we reversed the block, re-positioned the “thrust” cap and made the initial cut on the other side.