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| Nissan KA engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Nissan (Nissan Machinery) |
| Production | 1988–2021 |
| Layout | |
| Configuration | Naturally aspiratedInline-4 |
| Displacement |
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| Cylinder bore |
|
| Piston stroke |
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| Cylinder block material | Cast iron |
| Cylinder head material | Aluminum |
| Valvetrain | SOHC 2- or3 valves x cyl. (1988-1997) DOHC4 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 |
TheKA engines were a series offour-strokeinline-fourgasolinepiston engines manufactured byNissan, which were offered in 2.0 and 2.4 L. Theengines blocks were made ofcast-iron, while thecylinder heads were made ofaluminum.
Despite their large capacity, this motor was not equipped withbalance shafts.
When used in the passenger cars both versions of theKA24 used acrankshaft girdle, as opposed to individualmain bearing caps. In theNissan Hardbody andFrontier applications a crank girdle was not used.
TheKA20DE was aDOHC 16-valve engine produced from June 1999 through August 2007. It was mainly used in Japanese Domestic Market commercial vehicles.
TheKA24E was aSOHC 12-valve engine produced from July 1988 through January 1997. It usesHitachisequential electronic fuel injection, and features cast steelconnecting rods, a half-counterweightedcast steel crankshaft, and a cast aluminum cylinder head.
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 ofAguascalientes, 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 inYokohama, Kanagawa,Japan.[1] The KA24DE is very similar to the KA24E. The KA24E is SOHC withthree valves per cylinder actuated byrocker arms, and the KA24DE isDOHC with4 valves percylinder 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]
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.
KA24DE
KA24DE-A
