The 2.4 L (2,389 cc) KA24DE was used in many Nissan cars and trucks.
Most KA24DEs bound for the US were built in the city of Aguascalientes, Mexico, with the exceptions of the 240SX, 1994-97 Altima (re-badged Bluebird SSS), and the U13 Bluebird released in Australia with FWD configuration, which were manufactured in Yokohama, Kanagawa, Japan.
The KA24DE is very similar to the KA24E. The KA24E is SOHC with three valves per cylinder actuated by rocker arms, and the KA24DE is DOHC with 4 valves per cylinder and shim-over-bucket valve actuation.
Design improvements of the dual cam engine include the use of a knock sensor, larger diameter girdled main bearings in the Japanese block, different oil pan (not interchangeable between Japanese and Mexican blocks), different oil pickup (front pickup on Japanese block and side on Mexican block), dipstick location (toward the rear of block on Mexican and mid block on Japanese) and piston oil squirters.
In addition to the increased power and torque, the KA24DE has a higher redline than the KA24E.
KA24DE-A is an Altima specific model of the KA24DE.
The head and block are non-interchangeable between all other models and are uniquely cast for front wheel drive operation.

Differences in the Japanese block to Mexican are also present.
The Mexico blocks (all DEs except those found in the S series) implemented a distributor and oil pump drive similar to the L series; from the crank nose.
They also used a single row chain for the upper timing assembly without valve cover mounted guide.
In addition to this, they removed the rearmost cam journal in the Mexico head.
The crank rides on individually capped bearings with a slightly smaller diameter than the Japanese block, with shorter, slightly lower compression pistons in cylinders that have thicker walls than the Japanese DE.
They retained the knock sensor and piston oilers.

Specifications
Bore × Stroke: 89 mm × 96 mm (3.50 in × 3.78 in)
Displacement: 2,389 cc (2.4 L; 145.8 cu in)
Max.
power: 155 bhp (157 PS; 116 kW) at 5,600 rpm (Navara/Frontier (D22) 110 kW (148 hp) at 5600 rpm) (Xterra engine: 143 bhp (107 kW) at 4300 rpm)
Max.
torque: 160 lb⋅ft (217 N⋅m) at 4,400 rpm (Navara/Frontier (D22) 208 N⋅m (153 lb⋅ft) at 3600 rpm) 154 lb⋅ft (209 N⋅m) at 4400 RPM (2000-2004 Nissan Xterra).

Valvetrain configuration: DOHC, 4 valves per cylinder
Compression ratio: 9.5:1 (240SX 91-98), 9.2:1 (Navara/Frontier (D22)), 9.2:1 (Xterra Engines)
Timing Chain
Applications
KA24DE
2000-2004 Nissan Xterra
1998-2016 Nissan Navara/Frontier (D22)
1991-1998 Nissan 240SX
1997-2000 Nissan R'nessa (4WD model, Japan)
1998-2001 Nissan Presage U30 (Japan)
1999-2001 Nissan Bassara U30 (Japan)
1993-1997 Nissan Bluebird U13
Isuzu COMO (Japanese: Isuzu COMO)
Nissan Largo
KA24DE-A
1993-1999 Nissan Altima [150 hp (112 kW) - Max torque 154 lb⋅ft (209 N⋅m).
Compression ratio: 9.5:1]
2000-2001 Nissan Altima [Change hp & Torque]
The 2.4 L (2,389 cc) KA24DE was used in many Nissan cars and trucks. Most KA24DEs bound for the US were built in the city of Aguascalientes, Mexico, with the exceptions of the 240SX, 1994-97 Altima (re-badged Bluebird SSS), and the U13 Bluebird released in Australia with FWD configuration, which were manufactured in Yokohama, Kanagawa, Japan. The KA24DE is very similar to the KA24E. The KA24E is SOHC with three valves per cylinder actuated by rocker arms, and the KA24DE is DOHC with 4 valves per cylinder and shim-over-bucket valve actuation. Design improvements of the dual cam engine include the use of a knock sensor, larger diameter girdled main bearings in the Japanese block, different oil pan (not interchangeable between Japanese and Mexican blocks), different oil pickup (front pickup on Japanese block and side on Mexican block), dipstick location (toward the rear of block on Mexican and mid block on Japanese) and piston oil squirters. In addition to the increased power and torque, the KA24DE has a higher redline than the KA24E.
KA24DE-A is an Altima specific model of the KA24DE. The head and block are non-interchangeable between all other models and are uniquely cast for front wheel drive operation.
Differences in the Japanese block to Mexican are also present. The Mexico blocks (all DEs except those found in the S series) implemented a distributor and oil pump drive similar to the L series; from the crank nose. They also used a single row chain for the upper timing assembly without valve cover mounted guide. In addition to this, they removed the rearmost cam journal in the Mexico head. The crank rides on individually capped bearings with a slightly smaller diameter than the Japanese block, with shorter, slightly lower compression pistons in cylinders that have thicker walls than the Japanese DE. They retained the knock sensor and piston oilers.
Specifications
Bore × Stroke: 89 mm × 96 mm (3.50 in × 3.78 in)
Displacement: 2,389 cc (2.4 L; 145.8 cu in)
Max. power: 155 bhp (157 PS; 116 kW) at 5,600 rpm (Navara/Frontier (D22) 110 kW (148 hp) at 5600 rpm) (Xterra engine: 143 bhp (107 kW) at 4300 rpm)
Max. torque: 160 lb⋅ft (217 N⋅m) at 4,400 rpm (Navara/Frontier (D22) 208 N⋅m (153 lb⋅ft) at 3600 rpm) 154 lb⋅ft (209 N⋅m) at 4400 RPM (2000-2004 Nissan Xterra).
Valvetrain configuration: DOHC, 4 valves per cylinder
Compression ratio: 9.5:1 (240SX 91-98), 9.2:1 (Navara/Frontier (D22)), 9.2:1 (Xterra Engines)
Timing Chain
Applications
KA24DE
2000-2004 Nissan Xterra
1998-2016 Nissan Navara/Frontier (D22)
1991-1998 Nissan 240SX
1997-2000 Nissan R'nessa (4WD model, Japan)
1998-2001 Nissan Presage U30 (Japan)
1999-2001 Nissan Bassara U30 (Japan)
1993-1997 Nissan Bluebird U13
Isuzu COMO (Japanese: Isuzu COMO)
Nissan Largo
KA24DE-A
1993-1999 Nissan Altima [150 hp (112 kW) - Max torque 154 lb⋅ft (209 N⋅m). Compression ratio: 9.5:1]
2000-2001 Nissan Altima [Change hp & Torque]
Nissan KA engine