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Knock Sensor - located on engine block; retards timing if pinging/detonation is detected. Heated Throttle Body - heated by engine coolant. The QG18DE is used in the following vehicles: 2000-2006 Nissan Sentra B15 and N16; 2000-2005 Nissan Pulsar N16; 1999-2002 Nissan Primera P11.144; 2002-2007 Nissan Primera P12; 2000-2006 Nissan Almera N16
Nissan engineers wanted the VG to have improved performance, fuel economy, reliability, and refinement, while being both lighter and more compact than its predecessor. The resulting engine was designed by Nissan from scratch, and shared few mechanical components with its predecessor, or with any other automaker.
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 ...
It consists of a lower compression RB30E bottom end, more powerful oil pump, knock sensor, Garrett T3 turbocharger, 250 cc (15 cu in) injectors, different intake manifold and supporting ECU. The motor itself is still popular today in Australian and New Zealand motorsport and drag racing in VL Commodores, R31 Skylines and swaps in other vehicles.
It's commonly known as "Detonation or Knock". Engine management systems can overcome pre ignition by the means of a knock or detonation sensor. The sensor will detect pre ignition and retard the engines timing to protect the engine from damage. Undesired engine behavior will occur such as loss of performance or power.
It featured the 2.0L Z20 motor that was fed by a carburetor. Its compression ratio was at a high 9.4 to 1, and produced 95 hp (71 kW) and 112 lb⋅ft (152 N⋅m) of torque. It was able to do this because it featured a knock sensor that would retard the timing by about 10 degrees to prevent the engine from knocking.