Nissan Y44 / Y44E

Nissan Y44EThe Nissan Y44 is a 4.4 l (4,414 cc; 269.3 cu-in) gasoline-fueled, four-stroke cycle, spark-ignition internal-combustion V8 automobile piston engine, manufactured by the Nissan Motor Company from 1974 to 1989.

The Y44 engine has OHV cylinder head design with 16 valves (2 per cylinder) and a 4-barrel carburetor. Since 1975 it has an electronically controlled fuel system and emission regulation technology, called NAPS (Nissan Anti Pollution System)*.

With an 8.6:1 compression ratio the power and torque outputs are 204.0 PS (200.0 hp, 150.0 kW) at 4,800 rpm of horsepower and 343 Nm (35.0 kg·m; 253.1 lbf·ft) at 3,200 rpm of torque. The Nissan Y44E has 338 Nm (34.5 kg·m, 252.0 lbf·ft) at 3,200 rpm of peak torque.

*NAPS (Nissan Anti Pollution System). The initial introduction of NAPS technology was the installation of an exhaust gas recirculation valve (EGR valve), followed with the addition of a catalytic converter and an air pump that added oxygen into the exhaust to promote higher temperatures in the catalytic converter, thus cleaning the exhaust further. The Y44E was the first NAPS engine.

The breakdown of the engine code is as follows:

  • Y – Engine Family
  • 44 – 4.4 Liter Displacement
  • E – Electronic Port Fuel Injection

General information

Engine Specifications
Engine codeY44 / Y44E
LayoutFour stroke, V8 (90 &deg:)
Fuel typeGasoline
Displacement4.4 l, 4,414 cc (269.3 cu-in)
Power output204.0 PS (200.0 hp, 150.0 kW) at 4,800 rpm
Torque output Y44: 343 Nm (34.9 kg·m, 253 lbf·ft) at 3,200 rpm
Y44E: 338 Nm (34.5 kg·m, 252.0 lbf·ft) at 3,200 rpm
Fuel systemCarburetor/Nissan EGI
Power adderNone
Firing order1-8-4-3-6-5-7-2
Dimensions (L x H x W):

Cylinder block and head

The Y44 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 83 mm (3.26 in).

Cylinder block
Cylinder block alloyCast-iron
Compression ratio:8.6:1
Cylinder bore:92.0 mm (3.6 in)
Piston stroke:83.0 mm (3.26 in)
Cylinder head
Valve Arrangement:OHV
Valves:16 (2 valves per cylinder)

Vehicle applications

ModelYears Produced
Nissan President H2501974-1989
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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