Isuzu Kb250 2.5D 4Ja1 Crank New For Sale. At Engines For Africa in Denver and Selby Johannesburg Gauteng, We Sell New & Used Engines Gearboxes & Cylinder Heads Petrol Diesel alternators balancing shaft bell housings blocks cam caps camshafts carburettors used crankshafts conrods diesel pumps engine parts glow plugs power steering pumps rocker arms rocker shafts starters sub assembly turbo chargers.