1999-2001 Nissan KA24DE 2.4L Remanufactured Engine

Description

Exhaust manifold cracks, timing guide chatter, and severe piston blow-by under 155 lb-ft sustained cargo hauling compromise commercial route schedules until precision remanufactured tolerances restore stability inside the Nissan KA24DE 2.4L Remanufactured Engine engineered for 1999 to 2001 Nissan Frontier pickups, Xterra sport utilities, and commercial freight transport chassis. This DOHC 16-valve inline-four platform restores responsive mid-range pulling torque.

Featuring a deep-skirt high-nickel cast iron block with siamesed cylinder bores, this unit withstands substantial torsional stress during high-load hauling. A fully counterweighted forged steel crankshaft rotates inside tri-metal bearings, driven by forged I-beam connecting rods and hypereutectic pistons with graphite skirt coatings. Cylinder decks receive an Ra 30 micro-inch resurfacing for positive MLS gasket retention. Dry engine weight measures 370 lbs, combined with a 4.3-quart capacity steel oil sump.

Key Features of Nissan KA24DE

Fleet managers buy Nissan KA24DE remanufactured engine packages to bring light vocational work trucks back to precise original equipment manufacturer specifications. Each remanufactured long block undergoes vacuum decay testing to guarantee total fluid circuit separation before shipping.

• Dual overhead camshafts actuate four valves per cylinder to optimize volumetric breathing efficiency
• 0.0014 to 0.0022 inch main journal bearing clearances maintain resilient hydrodynamic lubrication film
• Dual-row timing chains eliminate timing stretch to maintain pinpoint valve timing under load
• Hardened steel valve seats prevent valve face recession during high-temperature highway transit cycles
• Multi-layer steel cylinder head gaskets maintain combustion pressure without coolant fluid leakage
• High-pressure internal oil pumps feed oil galleries to cool piston crowns during runs
• Computer balanced crankshaft components minimize vibration to protect Nissan KA24DE transmission linkages

Frontier Operational Combustion Pressure Limits

Oil circuit pressure measures 15 to 20 PSI at idle and expands to 50 through 65 PSI at 3000 RPM cruising speed. Coolant temperature regulates between 185°F and 198°F to preserve optimal thermal efficiency. This 2.4-liter DOHC engine generates 143 horsepower at 5200 RPM and 154 lb-ft continuous torque at 4000 RPM with a 9.2:1 compression ratio. Cranking compression produces 165 to 180 PSI across all four chambers. The cooling jacket dissipates 2100 BTU per minute during sustained full-throttle driving.

KA24DE Crankshaft Transmission Alignment Parameters

An 8-bolt rear crankshaft flange mounts flush to factory manual flywheels or automatic flexplates. Dial indicators confirm crankshaft endplay between 0.0028 and 0.0062 inches. The front crankshaft snout features dual keyways to secure the timing chain drive gear and harmonic balancer, holding positive accessory drive pulley alignment.

Fleet Lubricant Priming Service Guidelines

Mechanics must pre-lube the engine with clean motor oil by turning the oil pump shaft before ignition crank. Fill the crankcase with 5W-30 or 10W-30 API certified motor oil. This production engine is not engineered for standalone aftermarket boost controllers exceeding 7 PSI, drift competition, or ethanol fuel conversions.

• Check lubricant level and cooling reservoir fluid each shift prior to engine operation
• Drain initial break-in oil and install fresh oil filter after 500 miles
• Perform routine lubricant and filter changes every 3000 miles during continuous operation

Commercial Fleet Warranty Freight Details

Commercial fleet buyers receive a 3-Year / 100,000-Mile commercial fleet warranty covering structural block integrity and moving components. The heavy wooden crate includes one remanufactured long block engine, a complete engine install gasket kit, spark plug well seals, water pump gasket, and cold-test dyno pressure verification paperwork.