Nissan Z Engine - Z24

The Z24 is a 2.4 L (2,389 cc) inline-four produced from 1983 through August 1989. A throttle-body fuel injected version (Z24i) was also produced, beginning in April 1985.

Applications:

• 1983-1986 Nissan/Datsun 720
• 1986-1990 Nissan Hardbody Truck (Z24i)
• 1986-1990 Nissan Pathfinder
• 1987-1990 Nissan Vanette/Nomad

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 1985 model year and was replaced in 1990 by the KA24E engine. Beside the 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.

Engine Displacement - 2,389 cc Bore x Stroke:- 89.0 × 96.0 mm Compression Ratio:- 8.3:1

Power Ratings:

• Z24

Years - 1984-1986 Power - 103 hp (77 kW) at 4,800 rpm Torque - 134 ft·lbf (182 N·m) at 2,800 rpm

• Z24i

Years - 1986-1987 Power - 103 hp (77 kW) at 4,800 rpm Torque - 134 ft·lbf (182 N·m) at 2,800 rpm

Years - 1988-1989 Power - 106 hp (79 kW) at 4,800 rpm Torque - 137 ft·lbf (186 N·m) at 2,400 rpm