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Nissan Z engine: Wikis


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The Nissan Z series of automobile engines ranged from 1.8 L to 2.4 L and were produced from 1979 through August 1989. The Z series engines retained a nearly identical block to the earlier L Series with the exception of the Z24 which utilized a taller deck height to increase engine displacement. The most notable feature of the Z-Series engine was the introduction of the crossflow cylinder head which increased performance and reduced emissions by moving the intake ports to the right side of the vehicle opposite the exhaust ports. This change allows the fuel air mixture to more easily enter the combustion chamber and also allows the exhaust port velocity to more effectively scavenge the cylinder and reduce reversion pulses.



The Z16 was available only in the basic spec Nissan Navara (D21) in certain markets. It is an inline 4 with SOHC, 8 valves and a single downdraft carburator.



The Z18 is an 1.8 L straight 4 engine with SOHC and 8 valves. It produces 105 hp (78 kW).



The Z18E is a 1.8 L (1770 cc) fuel injected engine produced primarily for the Japanese market.



The Z18ET is a 1.8 L (1770 cc) turbocharged and fuel injected engine produced primarily for the Japanese market. It produces 135 hp (101 kW).



The Z20S is a 2.0 L (1952 cc) engine produced from 1979 through 1981. It was produced in 2-bolt and 3-bolt versions. It produces 88 hp (66 kW).


The Z20S (S denotes carbureted) was available in the USA until 1984 (720 pickup) at which time it had a 85 mm (3.3 in) x 86 mm stroke and a 9.4:1 compression ratio. Factory manual did not state HP. Source: 1984 Nissan Truck Factory Service Manual Model 720 Section EM page 38 Publication No. SM4E-0720U0 Sept 1983


The Z20 was fuel injected to become the Z20E and produced from 1979 through July 1984. It produces 100 ps (74 kW).


The Z20E was not available in the 720 pickup, only carbureted versions.


The Z22 (carb only) is a 2.2 L engine produced from 1981 through 1983. It produces 86hp (64kW)



The Z22E (EFI only) is a 2.2 L engine produced from 1981 through 1983.



The Z24 is a 2.4 L (2389 cc) engine produced from 1983 through August 1989. A fuel injected version (Z24i) was produced starting in April 1985. It produces 103 hp (77 kW).


Note: All Z20, Z22 and Z24 engines were known as NAPS-Z (NAPZ or NAPEZ) engines. NAPS for Nissan Anti-Pollution System. NAPZ motors had dual sparkplugs per cylinder except the pre-82 versions and later versions of the Z24 as fitted to the Pathfinder. However all NAPZ engines sold in California reportedly had dual plug heads regardless of the year.

The fuel injected version referenced above was denoted as the Z24i (Throttle Body Fuel Injection) and was first available in the Nissan Model 720 ST pickup during the 1986 crossover year to the (1986.5) D21 Hardbody and was later replaced by the KA24E engine. Beside fuel injection, a significant change for the Z24i was the addition of an optical crank angle sensor in the distributor rather than a vacuum advance and ignition module. This allowed for more precise engine management for the fuel injection system.

The General Specifications for the Z24 are:

Engine Type: - Inline 4 cylinder 4 Stroke Engine Displacement - 2389 cc (146.8 c.i.) Bore x Stroke:- 89.0 × 96.0 mm (3.50 x 3.78 in) Compression Ratio:- 8.3 : 1

Power Ratings were:

  • Z24

Years - 1984 - 1986 Power - 103 hp (77 kW) @ 4800 rpm Torque - 134 ft·lbf (182 N·m) @ 2800 rpm

  • z24i

Years - 1986 - 1987 Power - 103 hp (77 kW) @ 4800 rpm Torque - 134 ft·lbf (182 N·m) @ 2800 rpm

Years - 1988 - 1989 Power - 106 hp (79 kW) @ 4800 rpm Torque - 137 ft·lbf (186 N·m) @ 2400 rpm

External links

See also



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