Cummins 4BTA 3.9L Full Length Engine Block Machining Video on 3/22/24. Engine block being resurfaced by our Rottler Manufacturing F88S machining center. Engine block received 3 passes, .008” Total First @.001” Second @ .004” Third @ .003” Cylinder bore will be honed to .5mm (.020”). Engine is receiving a full rebuild and will be picked up in 2 weeks by Fisher Logging out of Northfield, MA. for a piece of his forestry equipment. This engine was removed from the SkyTrak Telehandler that we just po