What would you guys do?

[Rawze]

(12-28-2019 )JMBT Wrote:  CM2250, @m*m^2, no soot monster, 740,000. She runs like a top, using no noticeable coolant and very little oil. I had planned to drop the pan at 750K and roll in new rod and main bearings. What else should I do while the pan is off? Coolant pressure test? Change oil pump? Is it even necessary to do new rods and mains at 750K?? Just looking for your recommendations. Thanks

Doing the rod and main bearings at 750 - 800k miles ensures and prevents wrist pin failures if the engine does make it well past a million before an inframe... it IS proper maintenance, does not mater if it has been driven heavy, light, or otherwise.

YES< pressurize it and let it sit over night,.. check it thouroughly while the pan is off, and make a pictorial record of liner wear from the bottom up, etc.

- Also do all the other 250k miles maintenance items for the whole vehicle while its down... make it into a happy truck, not a miserable one.