[455Grandville]

Originally Posted by hurryinhoosier62

Brad,

I second your opinion of the 7.3/6BT comparison. In my experience, I would give a slight edge to the 7.3 P-stroke. They don't have the head warping problems the 6BT has.

Longer cylinder head = greater chance for warping

Seems to me Cummins 855s / 14Ls had this issue when they racked up 700-800K miles
as did 3406 CATs ? It's all going to expand and contract back and forth and longer = more of it.

Plus the 7.3 has a shorter more ridged crank.

Some 5.9s had poorly cast blocks from Brazil which were crack prone, and the death nail was that dwoel pin that came off in some years.

I know in medium duty use the 5.9 is gutless, the 7.3 is much better.