Nissan M3000 old cab assembly - blue space

Quick Details

Delong cab in use process will inevitably be some fault, so to find the problem, find a solution is to ensure traffic safety. We focus in the process of moving the collection, the driver feel the loss of engine power and abnormal sound, continue driving, the deterioration of the situation until the engine stops, the inspection results expressed as third cylinder piston melt top card lag. So, what is the diagnosis for this failure?