3116 Diesel Engine Assembly — 6.6L, 105 × 127 mm, for CAT Excavator 325B Complete 3116 engine assembly for the CAT 325B excavator and related machine frames. The 3116 is a 6.6 litre (402 cu in) inline six running a 105 mm bore and 127 mm stroke, fuelled by camshaft-driven mechanical unit injectors with no high-pressure injection pump anywhere in the circuit. Assembly number 114-2912 covers the machine builds, and remanufactured units travel on 0R-4426. This page sets the 3116