Nissan KA engine

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Nissan KA engine
Overview
Manufacturer	Nissan (Nissan Machinery)
Production	1988–2021
Layout
Configuration	Naturally aspirated Inline-4
Displacement	2.0 L (1,998 cc) 2.4 L (2,389 cc)
Cylinder bore	86 mm (3.4 in) 89 mm (3.5 in)
Piston stroke	86 mm (3.4 in) 96 mm (3.78 in)
Cylinder block material	Cast iron
Cylinder head material	Aluminum
Valvetrain	SOHC 2- or 3 valves x cyl. (1988-1997) DOHC 4 valves x cyl. (1991-2016)
Compression ratio	8.6:1, 9.1:1, 9.2:1, 9.5:1
Combustion
Fuel system	Sequential electronic FI
Management	Hitachi
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	134 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 (217 N⋅m) at 4400 rpm (1996-2004)
Chronology
Predecessor	Nissan Z engine
Successor	Nissan QR engine

The KA engines were a series of four-stroke inline-four gasoline piston engines manufactured by Nissan, which were offered in 2.0 and 2.4 L. 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 crankshaft girdle, as opposed to individual main bearing caps. In the Nissan Hardbody and Frontier applications a crank girdle was not used.