... feature of the WD415 series diesel engine keep consistent with those of the WD615 series diesel engine, namely the ... rod mechanism, valve train, gear train, lubrication, cooling system, gearbox, flywheel, flywheel housing etc. are made interchangeable with those of the WD615 ... The cylinder head, cylinder liner, combustion system and valve train are all same as those of the WD615/Euro2 engines ...