Featuring an exact 2389cc displacement, this Nissan Hardbody KA24E Remanufactured Engine features casting 40F narrow-port cylinder head architecture and a pre-installed front timing cover with oil pump. Machinists line-hone cast iron blocks and micro-polish crankshaft journals. Technicians must conduct complete cooling system vacuum bleeding and execute an exact 500-mile break-in oil change to protect the single overhead camshaft.

Engineered with a heavy-duty cast iron block casting marked KA24 or T50, this assembly provides extreme cylinder wall rigidity. The rotating foundation pairs a micro-polished forged steel crankshaft casting 86G with forged connecting rods and oversized hypereutectic pistons. SOHC 12-Valve cylinder head casting 40F features narrow intake ports diamond-resurfaced for composite head gasket sealing. Net engine weight equals 240 lbs inside crated dimensions of 36in length by 36in width by 36in height. Sump capacity measures 4.3 quarts.

Key Features of Nissan KA24E

Commercial fleet managers buy Nissan KA24E remanufactured engine long blocks to restore work truck hauling power and eliminate timing chain guide rattle. This assembly provides verified machine shop tolerances for rear-wheel-drive and 4-wheel-drive compact pickup trucks.

- Pre-installed front timing cover and oil pump assembly reduce workshop installation labor hours.
- SOHC 12-Valve cylinder head casting 40F narrow intake ports maintain high low-end intake charge velocity.
- Crankshaft casting 86G journals receive micro-polishing to hold total indicator runout under 0.0003in TIR.
- Diamond plateau honed cylinder walls establish an Ra 16 micro-inch finish for rapid ring seating.
- Align-honed cast iron main saddles support smooth crankshaft rotation under heavy truck towing loads.
- Heavy-duty timing chain tensioner and guide components prevent valvetrain slack and timing cover wear.
- Multi-layer cylinder head gaskets prevent combustion gas blow-by across resurfaced cast iron block decks.

Dyno Load Precision Machining Tolerances

Dyno cell testing validates mechanical oil pressure and low-RPM shaft torque output before shipping. The 2.4L 2389cc SOHC engine outputs 134 HP at 5,200 RPM and 154 ft-lbs of shaft torque at 3,600 RPM. Crankshaft main bearing oil clearances hold between 0.0011in and 0.0015in, while connecting rod clearance measures 0.0012in. Individual cylinder compression verifies at 180 PSI across all 4 cylinders. Hot engine oil pressure maintains 55 PSI at 3,000 RPM with regulated coolant operating temperatures steady at 190°F.

Vehicle Fitment Drivetrain Guide

This long block fits 1990 to 1994 Nissan D21 Hardbody pickups equipped with the 2.4L 2389cc SOHC KA24E engine, narrow-port head casting 40F, and distributor located in the timing cover. Drivetrains include rear-wheel drive and 4-wheel drive paired with manual or automatic transmissions requiring OEM bushing 12330-E3000. Fitment exclusions ban motorhome applications, wide-port head casting 72P pickups, or 240SX sport coupes due to distinct intake manifold patterns and oil pan sump configurations.

Installation Protocol Service Requirements

Technicians must inspect distributor drive gear timing marks, seat the transmission converter pilot bushing, and purge air from heater hoses during installation. Operating warnings explicitly ban installation in motorhomes, dual-wheel commercial haulers exceeding gross ratings, or custom turbo setups exceeding 6 PSI boost.

- Pre-fill the spin-on oil filter and prime engine lubrication passages with 10W-30 conventional oil.
- Drain initial break-in oil and install a replacement oil filter at the 500-mile service marker.
- Check mechanical rocker arm clearance and verify distributor timing advance with a timing light at 1,500 miles.

Warranty Terms Core Return Policy

This long block carries our standard 3-Year Unlimited-Mile warranty for reliable road service. We provide free prepaid return freight shipping for your depleted rebuildable core engine within a 30-day window. The crated package contains the remanufactured long block, pre-installed timing cover, oil pump, oil pan, and valve cover.