... . air-cooled direct injection 4-stroke diesel engines 2. pressure casting aluminum pump body. Diesel High Pressure Water Pump Features:1. Inlet x outlet ... 1.5" 2" x 2" 3" x 3"2. Centrifugal pump,diesel engine air cooled,direct injection, 4 stroke, single stage;3 ... . Pressure casting aluminum pump body;4. Self-suction and high-pressure structure; 5. Safe ...