DN0SD297 Nozzles... 185Bar Open Pressure

[ngoma]

Originally Posted by Ekus

do you think that compression lost in two cylinders through the exhaust valves can cause the unburnt fuel make that haze?

Yes, white/gray smoke can indicate raw unburnt fuel. If the valves are not completely closing there may not be sufficient compression to burn all the fuel.

I would also be concerned about this situation causing burnt valves/valve seats.

"Typically an exhaust valve problem, burnt valves are usually the result of hot combustion gasses escaping between the valve and valve seat when they don’t seal properly. Adequate sealing between the two also allows combustion heat to be conducted from the valve and into the seat, preventing the valve from overheating."

From Valve Decoder: What are Your Engine Valves Trying to Tell You?