Nissan KA engine

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Nissan KA engine
Ka24et.jpg
Overview
Manufacturer Nissan Motors
Production 1988-2004
Combustion chamber
Configuration I4
Displacement 2.0L
2.4L
Cylinder bore 86 mm (3.4 in)
89 mm (3.5 in)
Piston stroke 86 mm (3.4 in)
96 mm (3.8 in)
Cylinder block alloy Cast iron
Cylinder head alloy Aluminum
Valvetrain SOHC (1988-1996)
DOHC (1991-2004)
Combustion
Fuel system Fuel injection
Output
Power output 140 hp (100 kW) (1988-1996)
155 hp (116 kW) (1996-2004)
143 hp (107 kW) (1998-2004 Frontier & Xterra)
Torque output 152 lb·ft (206 N·m) at 4400 rpm (1988-1996)
160 lb·ft (220 N·m) at 4400 rpm (1996-2004)
Chronology
Predecessor Nissan Z engine

The KA engines were a series of inline-4 four-stroke gasoline piston engines manufactured by Nissan, which were offered in 2.0 L and 2.4 L versions. The engines blocks were made of cast-iron, while the cylinder heads were made of aluminum.

Despite their large capacity, this motor was not equipped with balance shafts.

When used in the passenger cars both versions of the KA24 used a crank girdle, as opposed to individual caps. In the Nissan Hardbody and Frontier applications a crank girdle was not used.

KA20[edit]

KA20DE[edit]

The 2.0 L (1998 cc) KA20DE was a smaller displacement KA engine used in Japan and other world markets for several vehicles:

Specifications[edit]

  • DOHC,16-valve In-line 4
  • Bore x Stroke (mm) 86.0 x 86.0
  • Max power 88 kW (120 PS) at 5200 rpm
  • Max torque 171 N·m (126 lb·ft) at 2800 rpm[1]
  • Valve Configuration: DOHC
  • Displacement: 1998 cc
  • Compression ratio: 9.5:1

KA24[edit]

KA24E[edit]

The KA24E was a SOHC 12-valve engine produced from July 1988 through January 1997. It uses Hitachi sequential electronic fuel injection, and features forged steel connecting rods, an internally balanced forged steel crankshaft, and a cast aluminum intake manifold.

Specifications
  • Bore × Stroke: 89.0 × 96.0 mm
  • Max power: 140 hp (105 kW) at 5600 rpm
  • Max torque: 152 lb·ft (206 Nm) at 4400 rpm
  • Valve Configuration: SOHC, 12 valves
  • Compression ratio: 8.6:1 (9.1:1 for early 1989 240SX)
  • Timing Chain (not Timing Belt a.k.a. Cambelt)
Applications

KA24DE[edit]

KA24DE Engine in an S14 240SX

The 2.4 L (2389 cc) KA24DE was used in many Nissan cars and trucks. Most KA24DEs bound for the US were built in the Mexican city of Aguascalientes, 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 Fukuoka Prefecture, 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 four 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.[citation needed]

Differences in the Japanese block to Mexican are also present. The Mexico blocks (all DEs except those found in the S series) implemented a distributer and oil pump drive more similar to the L series; from the crank nose. They also used a single row chain for the upper timing assembly with no 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 who have thicker walls than the Japanese DE. They retained the knock sensor and piston oilers.

Specifications
  • Bore × Stroke: 89.0 × 96.0 mm (3.50 in. x 3.78 in.)
  • Displacement: 2389 cc (145cid)
  • Max power: 155 hp (116 kW) at 5400 rpm (Navara/Frontier (D22) 110 kW at 5600 rpm) (Xterra engine: 143 hp at 4300 rpm)
  • Max torque: 160 ft·lb (217 Nm) at 4400 rpm (Navara/Frontier (D22) 208 N·m at 3600 rpm)
  • Valve Configuration: DOHC, 16 valves
  • Compression ratio: 9.5:1(240sx 91-98), 9.2:1(Navara/Frontier (D22)), 9.3:1(Xterra Engines)
  • Timing Chain
Applications

Swaps[edit]

The KA24DE is a popular engine for swaps, due to its strength, availability, and simplicity of design. It has been swapped into a number of vehicles, mainly other Nissan/Datsun products.

See also[edit]

References[edit]


This article incorporates information from the equivalent article on the Japanese Wikipedia.