Nissan VQ30DE 3.0L Engine Specs, Problems, and Reliability. Nissan started the production of the first huge engine of the VQ-series in 1994. It was the VQ30DE engine. The engine changed the ve30de and the vg30de.
The engine has 60 deg V-shape aluminum cylinder block. The block height is the same as VQ35, and it is 215 mm. Linking rods length is 147.6 mm. VQ30DE pistons are more huge than VQ35DE pistons. There are aluminum cylinder heads on each cylinder bank. Each head has two camshafts and 12 valves. Valve lift of the original VQ30DE is 8.55/ 8.55 mm, duration – 232/232 (single pattern cams). The crankshaft drives camshafts by the trustworthy timing chain. The VQ30 does not have hydraulic tappets/lifters.
The special variation with direct fuel injection – the VQ30DD was produced from 1997 to 2004. The compression ratio of this engine is 11:1. For more power, this version is geared up with variable valve timing system (CVTC) and variable geometry intake manifold. In 2000 the VG30DE engine was redeveloped and named as VQ30DE-K. This engine has brand-new exhaust and consumption manifolds. Camshafts specs: duration – 224/232; valve lift – 8.55/ 9.0 mm.
Let’s say about turbocharged variation VQ30DET. Of course, the engine has enhanced connecting rods and crankshaft, brand-new pistons for lower compression ratio (9:1), the special consumption manifold and headers. Garrett M24 plays the turbocharger role. The increase of stock VQ30DET is just 0.5 bar. All these parts help to output 280 hp of power and 285 lb-ft of torque.
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VQ30DE 3.0 l engine Problems and Reliability
The 3.0 l VQ30 engine is really trusted. The very first production year engines are cheap and extremely easy in repair. The common problems resemble VQ35, like:
- High oil intake. Drivers of the VQ35DE are really conscious fuel quality. They produce ceramic dust, which harms the cylinders and piston rings. As a result, the engine has low compression, high fuel and oil intake, and other dead engine signs.
- Engine getting too hot. That is not a normal problem, however it belongs to be. Examine the radiator condition and expansion tanks of the cooling system for any leakages.
you must see more engine detail in here: Engine – US Cars News or you can see on wiki here
Nissan VQ30DE 3.0L Engine Specs
| Manufacturer | Iwaki Plant |
| Production years | 1994-2007 |
| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Fuel type | Gasoline |
| Fuel system | Fuel injection |
| Configuration | V |
| Number of cylinders | 6 |
| Valves per cylinder | 4 |
| Valvetrain layout | DOHC |
| Bore, mm | 93.0 |
| Stroke, mm | 73.3 |
| Displacement, cc | 2987 |
| Type of internal combustion engine | Four-stroke, naturally aspirated and turbocharged versions |
| Compression Ratio | 10:1 – VQ30DE 11:1 – VQ30DD 9:1 – VQ30DET |
| Power, hp | 192-280 hp /5,800-6,400 |
| Torque, lb ft | 205-285 lb-ft /3,600-4,800 |
| Engine weight | – |
| Firing order | 1-2-3-4-5-6 |
| Engine oil weight | 5W-30, 5W-40, 10W-30, 10W-40 |
| Engine oil capacity, liter | 4.0 |
| Oil change interval, mile | 9,000 (15,000 km) or 12 months |
| Applications | Nissan Skyline, Nissan Maxima, Infiniti I30, Nissan Bassara, Nissan Cefiro, Nissan Gloria, Nissan Leopard, Nissan Presage |