Line honing crank journals

There 'two' different methods for dealing with Mains in an Engine Block.

* Line Honing
* Line Boring

On the Automotive Engines, Line Honing is the 'typical' method to use.

On Diesel Engines, the only method to use is Line Boring.

Line Honing {ie; Sunnen Line Honing} the stone-mandrel will follow the
old hole.

So, if you clean up the bottom of the Main Cap {.002"}.

Then technically, you are removing more material from the 'Block Main' then
the 'Main Cap'.

The same theory can be used when Reconditioning Connecting Rods
on a Sunnen {LBB-1810} Rod Reconditioning Machine.

You are taking more material off the Connecting-Rod then the Cap.