Piston Cylinder Liner Kit 612600030011A for Weichai Wd615 Engine. WD615 Engine Application Designed for Weichai WD615 diesel engine overhaul and replacement applications. Piston Part Number The piston is identified by part number 612600030011A and is designed for the corresponding WD615 engine configuration. Cylinder Liner Part Number The cylinder liner is identified by part number 612630010015 and is supplied for the corresponding WD615 engine application. Four Piece Overhaul Set A complete four piece engine set normally consists of pistons, piston rings, cylinder liners and piston pins, providing a convenient solution for engine rebuilding. Precision Fit Pistons and cylinder liners are manufactured according to the required dimensional specifications to help achieve proper piston to liner clearance. Reliable Engine Performance Quality piston and liner components help support proper compression, combustion efficiency, lubrication and heat transfer. Engine Overhaul Solution Suitable for replacing worn piston and liner components during complete engine overhaul or cylinder repair.