isx 870 overhaul

[rgreen]

I have a friend that has 870, He just had it overhauled and his truck has less than 300 miles on the major overhaul and he's now finding oil in fuel filter, also the mechanic never counterbore the block, also he had oil leak coming out from the value cover also the fuel tanks now has oil soot inside of it. Prior to having his truck inframe he took into Cummins and they told hold him his block was fretted.