Nissan H engine

Nissan H engine
Nissan H engine
Manufacturer Nissan Motors
Production 1956-1960, 1962-present
Predecessor Nissan G engine
Configuration I4 & I6
Displacement 1.5L
Cylinder block alloy Cast iron
Cylinder head alloy Cast iron
Aluminum (later versions)
Valvetrain OHV
SOHC (U20)
Fuel system Carburetor

The Nissan H series of automobile engines is an evolution of the Nissan "R" engine which was based on the 1.5L 3 main "G" used in the 1960s. Both straight-4 and straight-6 versions were produced, it is a pushrod OHV design with iron block, early models with an iron head, later models with aluminum head. Versions of this motor have been used in many Nissan autos and forklifts, well into the eighties and a version called H20II is still in production today. The SD diesels are based on this series of motors (bore spacing and basic block layout)




The 1H is not related to the later H engines. It was also an all-iron, OHV engine, but with a bore and stroke of 73 and 89 mm it displaced 1,489 cc. Power was 50 PS (37 kW) at 4,400 rpm in 1956, but this increased to 50 PS (37 kW) in August 1958.[1]



The basic H is a 1.9 L (1,883 cc) engine produced from 1962 for Nissan's Cedric. Bore was 85 mm (3.3 in) and stroke was 83 mm (3.3 in). The 8.0:1 compression version produced 92 hp (69 kW) and 117 ft·lbf (159 Nm), while a high-compression engine (8.5:1) produced 95 hp (71 kW) and 120 ft·lbf (163 Nm).



The H20 is the most-common member of the family. Displacing 2.0 L (1,982 cc) thanks to a larger (87.2 mm) bore, H20 engines produced around 99 hp (74 kW) and 123 ft·lbf (167 Nm).


Also N230S, T40, forklifts and other machinery


The R16 motor utilised essentially the same block as the H20, but a shorter piston stroke resulted in a capacity reduction of 387 cc. The R16 was later named a H16. The "R" motor made the switch from 3 to 5 main bearings during its life for improved reliability, and the H20 was developed from this arrangement. The R/H16 bore and stroke is 87.2mm x 66.8mm producing 1,595 cc, 8.0:1 compression, 147 kg/324 lbs +/-90HP

Applications: The R16 motor was used in the SP(L)-311 1600 Datsun Fairlady Roadster, the R(L)411 SSS Datsun Bluebird, the CSP311 Nissan Silvia, and later the N140 Nissan Junior.


The U20 was similar to the H20 but with an SOHC cylinder head designed by Prince. It was used only in the Datsun Fairlady SR311. The U20 produces 135-150 hp.



The H30 is a 3.0 L (2,974 cc) straight-6 version produced from 1965. Bore was 83 mm (3.3 in), and stroke was a long 100 mm (3.9 in), producing a very undersquare design. Output was a low-revving 120 hp (97 kW) and 173 ft·lbf (235 Nm). The H30 is basically an H20 with 2 extra cylinders.


This motor is used in large forklifts

See also


  1. ^ Ozeki, Kazuo (2007) (in Japanese). 日本のトラック・バス 1918~1972 [Japanese Trucks and Buses 1918-1972:]. Tokyo: Miki Press. pp. 98–99. ISBN 978-4-89522-494-9. 
  2. ^ (in Italian) Quattroruote: Tutte le Auto del Mondo 77/78. Milano: Editoriale Domus S.p.A. 1977. pp. 554–556. 

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