 A gross [net ] Cat 3524B HD EUI 24-cylinder,
displacement]], electronic unit injection, quad single-stage turbocharged, liquid aftercooled, four-stroke diesel engine powers the 797.The Cat 3524B HD engine is a tandem unit consisting of two 12-cylinder Cat 3512B HD engine blocks coupled to operate as a single engine with a combined displacement of 106 liters (6468 cubic inches).A gross [net ], quad turbocharged Caterpillar 3524B engine powers the 797B.