my experience if from disassembling and reassembling these old diesels,my nails use to be clear but now there is a permanent dark tint so i suppose one could call it practical experience.
when the pump locks the only common problem from both engines is a scoured crank shaft,the one with 280k took out the chain and the front timing cover,the second one just snapped the drive assy shaft on the oil pump,but again both damaged the crankshaft.
i have already posted my opinion as to preventive maint for this engine,baffel bolts reinstall correctly,rod bending is caused by turbo failure,new rods are stronger but one has to maintain the turbo or the engine gets too dirty to operate.
larry perkins
72 old cars