From 1998 to 2006, the company’s factories produced the 1.8-liter Nissan QG18DE engine, also known as QG18, which was fitted to the Almera, Primera, and other mid-size models. The power unit was a gas version with 105 horsepower and its own index, QG18DEN.
Nissan cars with QG18DE engines had high torque at low revs. Such an engine is thought to be extremely economical; its fuel consumption is fixed at roughly 7 liters per 100 kilometers, and it produces 97% of its torque in a low range of 2400–4800 rpm. A unique design of the piston crown with a neutralizer surface of up to 50% ensures low toxicity and environmental cleanliness.
The QG13DE, QG15DE, QG16DE, and QG18DD internal combustion engines are also members of the QG family.
The engine was installed on:
- Nissan Almera 2 (N16) in 2000 – 2006;
- Nissan Almera Tino 1 (V10) in 2000 – 2006;
- Nissan Avenir 2 (W11) in 1998 – 2005;
- Nissan Bluebird Sylphy N16 in 2000 – 2006;
- Nissan Primera 2 (P11) in 1998 – 2002;
- Nissan Primera 3 (P12) in 2001 – 2008;
- Nissan Sentra 5 (B15) in 2000 – 2006;
- Nissan Wingroad 2 (Y11) in 1999 – 2005.
Specifications
| Production years | 1998-2006 |
| Displacement, cc | 1769 |
| Fuel system | distributed injection |
| Power output, hp | 115 – 128 |
| Torque output, Nm | 158 – 175 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 80 |
| Piston stroke, mm | 88 |
| Compression ratio | 9.5 – 10 |
| Features | EGR |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | at the N-VCT inlet |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 2.7 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for Nissan Primera 2005) — city — highway — combined |
9.6 6.1 7.4 |
| Engine lifespan, km | ~250 000 |
| Weight, kg | 138 |
Disadvantages of the QG18DE engine
The timing chain causes the most issues; it frequently rings after 100,000 kilometers;
Complaints regarding oil consumption, which can begin even at low mileage, follow;
Antifreeze seeps into the ECU through the idle valve gasket;
The throttle and EGR valve must be cleaned on a regular basis to ensure the motor runs smoothly;
The network details instances where the catalyst is destroyed when the crumbs are compressed into the cylinder.