D950 push rods

[OrangeB82]

Hello Everyone, I am new to repairing my B8200 HST tractor. It was running producing white smoke. It stopped running. I have removed the valve cover and saw that the push rods are bend. The valves are functioning. What would case the rods to bend? I have only used tractor over the last two years. Purchased used and was running fine. Looking for help for possible root cause and items I need to look into. John

 

[North Idaho Wolfman]

Pull the head and inspect the cylinders and pistons and valves, about the only thing logicly that can bend push rods is the piston slapping the valves, which in a D950 is extremely rare!

 

[Lil Foot]

I guess I'd also ask-
All of the pushrods?
Intake only?
Exhaust only?
Confined to one cylinder?

I have seen bent pushrods on three occasions-
Severe lugging of an old Ford Comet 6 cylinder up a mountain grade (all pushrods)
An old Kohler that swallowed a 3/8" hex nut (intake only)
A Harley that swallowed a handful of dimes (all pushrods one cylinder)

 

[North Idaho Wolfman]

With older diesels it common to find rags from them trying to snuff out a run away.