Models covered in this manual are:
SD22 SD23 SD25 SD33
Also IPL

Includes sections:
Disassembly
Components
Repair
Inspection
Assembly
Service
Tools

68 pages of all you need to know about the Nissan diesel engines SD SD22 SD23 SD25 SD33


SD20

The SD20 is a normally aspirated 2.0L Straight 4 diesel engine. The Diesel version Nissan Cedric in mid 1960s was using this engine.
SD22

The SD22 is a normally aspirated 2.2L (2164 cc) Straight 4 diesel engine. It produces 70 hp.[verification needed] It was used in the 1965-1971 Nissan Cedric It was also produced in a marine version MN 22 by Chrysler Marine under license during the 1980s.

The SD22 was used in the Datsun 720 pickup trucks 1980 through 1983, producing 61 SAE brake horsepower @ 4000 rpm. The engine has three main bearings (an SD33 six minus two rear cylinders) and was never available with turbocharging like its six-cylinder derivative. In 1981, pistons were upgraded to a three ring piston with a steel compression ring carrier cast as part of the piston for improved durability.

The engine is popular in Australia utilized mostly as a reliable pump for remote livestock stations. It is also used in the Scout. The engine may still by manufactured and imported by JESCO in California. JESCO also supplies parts. Blue Ridge Marine in Lake City, Washington, USA, 800.621.2215 handles the marine version. The marine version uses a water cooled exhaust manifold and expansion tank which are available from the original manufacturer Thompson Foundry in Surrey, BC, Canada, 604.596.9611
SD23

The SD23 is a 2.3L (2289 cc) Straight 4 diesel engine with 8 valves (2 per cylinder), and a distributor type injection pump. It produces 73 SAE hp @ 4300rpm[verification needed]
SD25

Fitted to Nissan 720 pickup trucks 1983 through 1986 and first year D21 Nissan pickups in 1987.Also fitted to Nissan Cabstar. Featured five main bearing crankshaft & redesigned Straight 6
SD33

The SD33 is a 3.3L (3,246 cc/198.1 cu in) Straight 6 diesel engine, most known for its use in the Nissan Patrol MQ (160 series) from 1980-1983[1] and the Nissan C80. The SD33 produces 98 hp.

The Engine was also used in the UD 3400 series light truck, large forklifts, Marine applications, in International Scout offerings from 1976 to 1979,as well as Jeep CJ-10 and Cj-10a flightline tow vehicles from 1985 to 1986.