Nissan Y40

Nissan Y40The Nissan Y40 is a 4.0 l (3,988 cc, 243.4 cu-in) gasoline-fueled, four-stroke, spark-ignition internal-combustion V8 automobile piston engine, manufactured by the Nissan Motor Company from 1965 through 1973. Nissan built its first V8, in 1965 for its President limousine. The Y engine has been succeeded by two families of V8, the VH series during the 1980s and 1990s and the new VK series, which is also used in select Infiniti models.

The Y40 engine has OHV cylinder head design with 16 valves (2 per cylinder) and a 4-barrel carburetor Hitachi KHA-342-IE with dual throat down draught. It produces 197.0 PS (145.0 KW; 194.0 HP) at 5,000 rpm of output power and 323 Nm (32.9 kg·m; 238.4 lbf·ft) at 3,200 rpm of torque.

The Nissan Y40 bore is 92.0 mm (3.6 in) and stroke is 75.0 mm (3.0 in) and the compression ratio rating is 9.0:1.

The breakdown of the engine code is as follows:

  • Y – Engine Family
  • 40 – 4.0 Liter Displacement

General information

Engine Specifications
Engine codeY40
LayoutFour stroke, V8 (90 &deg:)
Fuel typeGasoline
Displacement4.0 l, 3,988 cc (243.4 cu-in)
Power output197.0 PS (145.0 KW; 194.0 HP) at 5,000 rpm
Torque output323 Nm (32.9 kg·m; 238.4 lbf·ft) at 3,200 rpm
Fuel systemCarburetor: Hitachi KHA-342-IE
Power adderNone
Firing order1-8-4-3-6-5-7-2
Dimensions (L x H x W):

Cylinder block and head

The Y40 engine has a cast-iron cylinder block with five main bearings. The cylinder bore is 92 mm (3.6 in) and the piston stroke is 75 mm (3.0 in).

Cylinder block
Cylinder block alloyCast-iron
Compression ratio:9.0:1
Cylinder bore:92.0 mm (3.6 in)
Piston stroke:75.0 mm (3.0 in)
Cylinder head
Valve Arrangement:OHV
Valves:16 (2 valves per cylinder)

Vehicle applications

ModelYears Produced
Nissan President H1501965-1973
Nissan Cedric Patrol Y130 (Police only)1965-1971
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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