[Synchro909]

The way the inserts stand proud of the block is what we call "crush". Maybe you guys use the same term but Terry is right, they should be about 0.003 or 4" high so that when the cap is torqued down, they are forced into the block. That serves two purposes - to make them round and help stop them spinning in the block. There should be nothing between the cast iron of the block and the inserts.