The 2.3-liter Nissan VQ23DE engine (or VQ23 for short) was introduced in 2003 as a replacement for the junior representative of the popular V6 engine line and was installed only on the Teana sedan and its clones. This power unit was produced in the only version of the boost for 173 hp and 225 Nm.
The VQ20 series also includes internal combustion engines: VQ20DE, VQ25DE, VQ25DET, VQ25DD and VQ25HR.
The engine was installed on:
- Nissan Cefiro 4 (J31) in 2003 – 2008;
- Nissan Teana 1 (J31) in 2003 – 2008;
- Samsung SM5 2 (EX1) in 2005 – 2010;
- Samsung SM7 1 (EX2) in 2004 – 2011.
Specifications
| Start of production | 2003 |
| Displacement, cc | 2349 |
| Fuel system | distributed injection |
| Power output, hp | 173 |
| Torque output, Nm | 225 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 85 |
| Piston stroke, mm | 69 |
| Compression ratio | 9.8 |
| Features | NDIS |
| Hydraulic lifters | no |
| Timing drive | three chains |
| Phase regulator | at the CVTC intake |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.0 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for Nissan Teana 2007) — city — highway — combined |
13.7 8.3 10.3 |
| Engine lifespan, km | ~320 000 |
| Weight, kg | 180 |
Disadvantages of the VQ23DE engine
- The main problem with these engines is that catalyst crumbs get into the combustion chamber;
- If your oil consumption exceeds 1 liter per 1000 km, check the cylinders for scuffing;
- A lot of complaints about floating speed due to contamination of the idle valve;
- Monitor the thermal regime of the motor, overheating quickly leads to warping of the cylinder head;
- Closer to 200,000 km of run, it usually already stretches and the timing chain begins to rattle;
- There are leaks from the camshaft position sensors or from under the valve cover.
