The engines were mainly used in heavy applications, such as buses and trucks. All UD engines retain the same bore and stroke ratio 110 mm x 130 mm. Inner: 58.9 mm (2.3189 in) Outer: 59.5 mm (2. series of diesel engines were produced by Nissan from 1971 through 1983 in a range of configurations from 3 cylinder (displacement 3.7 l) to 12 cylinder (14.8 l). Intake valves are 48.5 mm (1.91 in) in diameter, and the exhaust valves are 39.5 mm (1.55 in). The engine has OHV design with a single camshaft and two valves per cylinder (8 valves in total). Number of piston rings (compression / oil):
The cylinder bore is 108.0 mm (4.25 in), piston stroke is 126.0 mm (4.96 in). The Nissan FD42 motor has a cast-iron cylinder block with a five-bearings supported system and an aluminum alloy piston for high strength, lightweight and good heat conductivity two compression and one oil control rings.
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