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The Nissan P engine is a large overhead valve, inline-six cylinder engine manufactured by Nissan Diesel Motor Co., Ltd. from 1959 to 2003 and used in light-duty trucks by Nissan, as well as in the Nissan Patrol. It replaced Nissan's older, sidevalve engines with which it shared its dimensions.[2] This series of engines were based on the pre-war Type A engine, which was a license built Graham-Paige design.[1]

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Nissan P engine
Overview
Manufacturer	Nissan Motors
Production	1959-2003
Layout
Configuration	Inline-6
Displacement	3.7 L (3,670 cc) (NAK/NB) 4.0 L (3,956 cc) (NC/P40)
Cylinder bore	82.5 mm (3.25 in) (NAK/NB)[1] 85.7 mm (3.37 in) (NC/P40)
Piston stroke	114.3 mm (4.50 in)
Valvetrain	OHV
Combustion
Fuel system	Carburetor
Cooling system	Water cooled
Output
Power output	92 kW (125 PS; 123 hp) 99 kW (135 PS; 133 hp) 107 kW (145 PS; 143 hp) (after 1965)
Chronology
Predecessor	Nissan NC engine
Successor	Nissan TB engine

NAK

Introduced in 1950, this is a 3.7 L (3,670 cc) petrol inline six-cylinder engine which produces 75 hp (56 kW; 76 PS). This was directly derived from Nissan's pre-war A engine, a license-built Graham-Paige unit.

Applications:

• Nissan 290 Bus
• 1950 Nissan Patrol 4W70
• 1951 Nissan Patrol 4W60
• 1952-1953 Nissan 380
• 1952-1953 Nissan 390 Bus

NB

Introduced in 1953, this is a 3.7 L (3,670 cc) petrol inline six-cylinder engine which produces 95 hp (71 kW; 96 PS).[1]

Applications:

• 1953-1954 Nissan 480
• 1953-1954 Nissan 490 Bus
• 1955 Nissan Patrol 4W61

NC

Introduced in 1955, this is a 4.0 L (3,956 cc), sidevalve petrol inline six-cylinder which produces 105 PS (77 kW; 104 hp) at 3,400 rpm. Bore and stroke are 85.7 mm × 114.3 mm (3.37 in × 4.50 in). It was used in various buses and trucks as well as in early Nissan Patrols.[2]

Applications:

• 1955-1959 Nissan 482 Truck[3]
• 1955 Nissan 492 Bus[3]
• 1955-1957 Nissan 580 Truck
• 1958-1959 Nissan 582 Truck
• 1955-1957 Nissan 590 Bus
• 1958-1959 Nissan 592 Bus
• 1955-1959 Nissan Carrier 4W72
• 1956-1959 Nissan Cabstar E590
• 1956-1959 Nissan Patrol 4W65

P

The P is a gasoline-powered, overhead valve 4.0 L (3,956 cc) inline six-cylinder[2] with 125 PS (92 kW; 123 hp) at 3,400 rpm initially. Bore and stroke are 85.7 mm × 114.3 mm (3.37 in × 4.50 in).[2] Later with 135 PS (99 kW; 133 hp), further modifications in 1965 increased the power to 145 PS (107 kW; 143 hp). Later variants were called P40, reflecting the engine displacement in liters (4.0). A variant especially for fire-fighting duties, with a stronger alternator, an engine block heater, and various other improvements, was called the PF engine.

Applications:

• Nissan Cabstar E690
• 1959-1960 Nissan Patrol 4W66
• 1959-1968 Nissan Carrier 4W73
• 1959-1968 Nissan 680 Truck
• 1960-1968 Nissan 690 Bus
• 1960-1980 Nissan Patrol 60 series
• 1963-1968 Nissan FR40 fire engine[4]
• 1968-1969 Nissan 681 Truck
• 1968-1969 Nissan 691 Bus
• 1970-? Nissan G780[3]
• 1980-1989 Nissan Patrol 160 series
• 1986-2003 Nissan Patrol 260 series

References

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