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rotorwrench · 10-23-2019, 05:56 PM

Cast iron can be tinned but an engine block is too big to make it practical. Con rods are forgings so they tin a lot easier. Some of the main caps are forged but I don't think the rear one is. The main bearings in the block is where they do most of the peening. The babbitt shrinks so it has to be forced to fit by the peening process.

I don't know how lead will be. It works at lower temps and may not shrink as much but I have no idea. Folks that do this stuff regularly don't use lead.

10-23-2019, 05:56 PM	#9
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,440	Re: Machinery Cast iron can be tinned but an engine block is too big to make it practical. Con rods are forgings so they tin a lot easier. Some of the main caps are forged but I don't think the rear one is. The main bearings in the block is where they do most of the peening. The babbitt shrinks so it has to be forced to fit by the peening process. I don't know how lead will be. It works at lower temps and may not shrink as much but I have no idea. Folks that do this stuff regularly don't use lead.