city of Aguascalientes. Bore and stroke is . The engine is tuned to achieve most of its torque at low revs at the expense of raw power at high revs, making the engine very responsive in day-to-day driving. It has a cast-iron engine block, aluminum DOHC cylinder head, uses Multi-port fuel injection, forged-steel connecting rods, two single-piece cast camshafts and a cast-aluminum intake manifold. It also features N-VCT (Nissan's Valve Timing Control technology). This engine received the RJC Technology of The Year Award of 2001. Specifications Displacement - Layout - DOHC Inline-4 (Straight-4) with VVT tech (called NVTC). Valves - 16, 4 for each cylinder Power - to at 6000 rpm Torque - to at 2800 rpm Redline - 6500 rpm Fuel Delivery System - electronic fuel injection Fuel compression ratio - 9.5:1 Emissions Control Devices OBDII - On-board Diagnostic System (codes can be read/erased by a variety of readers, e.g. ). Nissan Pulsar N16 Models without EuroOBD in Australia do not have OBDII. EGR - Exhaust Gas Recirculation HO2S - (4) Oxygen Sensors (2 before exhaust catalyst, 2 after) - note a series 2 1.8l has only 2 O2 sensors: 1 pre-catalytic-converter and 1 downstream from it. TWC - Three Way Catalyst (2 in exhaust manifold, 1 under car). EVAP - Charcoal Evaporative Purge Canister. Ignition Timing: 9 degrees BTDC (can be altered +/- 2 degrees using CONSULT-II handheld diagnostic tester, e.g. ). 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 2000-2006 Nissan Almera Tino 1999-2006 Nissan Primera 2000-2006 Nissan Expert 1998-2006 Nissan Avenir 1999-2005 Nissan Wingroad/AD van Y11 1999-2005 Nissan Bluebird Sylphy G10 1998-2004 Nissan Sunny B15 QG18DEN The QG18DEN is the natural gas version of the QG18DE. It produces at 5600 rpm and at 2800 rpm. Bore and Stroke are . It was used in the Nissan AD van from 2000 to 2008. See also List of Nissan engines References QG Straight-four engines Gasoline engines by model