The Nissan VG30ET is turbocharged a 3.0 l (2,960 cc, 180.62 cu.in.) V6 60° straight-four, four-stroke cycle gasoline engine from Nissan VG-family.
The VG30ET features cast-iron block and two aluminum heads with single overhead camshafts (SOHC) and two valves per cylinder. The Nissan VG30ET engine is equipped with multi-point fuel injection and mechanically timed electrical ignition system with a single ignition coil and mechanical distributor. Until 1987 the engine used Garrett T3 turbocharger (6.8 psi; 0.47 bar) since 1988 model year the VG30ET used Garrett T25 (4.5 psi; 0.31 bar) to reduce turbo lag.
Cylinder bore and the piston stroke are 87.0 mm (3.43 in) and 83.0 mm (3.27 in), respectively. The early version has a compression ratio rating 7.8:1, since 1988 the compression ratio was increased to 8.3:1. The produced from 203 PS (149 kW; 200 HP) of maximum horsepower for JDM and USDM to 234 PS (172 kW; 230 HP) for the European market and from 308 Nm (31.42 kg·m; 227.3 ft·lb) to 342 Nm (34.88 kg·m; 252.4 ft·lb) of torque, respectively. On April 1987 the “W” series VG30 was released, and the output power was increased to 208 PS (153 kW; 205 HP).
The breakdown of the engine code is as follows:
- VG – Engine Family
- 30 – 3.0 Liter Displacement
- E – Multi Point Fuel Injection
- T – Turbocharged
General information
Engine Specifications | |
Engine code | VG30ET |
Layout | Four stroke, V6 |
Fuel type | Gasoline (petrol) |
Production | |
Displacement | 3.0L, 2,960 cc (180.62 cu in) |
Fuel system | Multi Point Fuel Injection |
Power adder | Garrett T3, Garrett T25 |
Power output |
195 PS (143 kW; 192 HP) at 5,200 rpm 203 PS (149 kW; 200 HP) at 5,200 rpm 208 PS (153 kW; 205 HP) at 5,200 rpm 234 PS (172 kW; 230 HP) at 5,200 rpm |
Torque output |
308 Nm (31.42 kg·m; 227.3 ft·lb) 342 Nm (34.88 kg·m; 252.4 ft·lb) |
Firing order | 1-2-3-4-5-6 |
Dimensions (L x W x H): | – |
Weight | ~ 220 kg (485 lbs) |
Cylinder block
The VG30ET has a cast-iron block with a four-bearings crankshaft supported system. The cylinder bore is 87.0 mm (3.43 in), piston stroke is 83.0 mm (3.27 in). The Nissan VG30ET motor has two compression and one oil control rings. The connecting rod center distance is 154.10 mm (6.0669 in). The crankshaft main journal diameter is 62.9 mm (2.48 in) and crankpin diameter is 49.9 mm (1.97 in), center distance is 41.5 mm (1.63 mm).
Cylinder block | ||
Cylinder block alloy | Cast-iron | |
Compression ratio: | 7.8:1 or 8.3:1 | |
Cylinder bore: | 87.0 mm (3.43 in) | |
Piston stroke: | 83.0 mm (3.27 in) | |
Number of piston rings (compression / oil): | 2 / 1 | |
Number of main bearings: | 4 | |
Cylinder inner diameter (standard): | 87.000-87.010 mm (3.4252-3.4256 in) | |
Piston skirt diameter (standard): | 86.967-86.975 mm (3.4238-3.4242 in) | |
Piston pin outer diameter: | 20.993-20.998 mm (0.8265-0.8267 in) | |
Piston ring side clearance: | Top | 0.040-0.073 mm (0.0016-0.0029 in) |
Second | 0.030-0.063 mm (0.0012-0.0025 in) | |
Piston ring end gap: | Top | 0.21-0.44 mm (0.0083-0.0173 in) |
Second | 0.18-0.44 mm (0.0083-0.0173 in) | |
Oil | 0.20-0.72 mm (0.0079-0.0299 in) | |
Connecting rod small end diameter: | 20.958-20.971 mm (0.8251-0.8256 in) | |
Connecting rod center distance: | 154.1-154.2 mm (6.067-6.071 in) | |
Crankshaft main journal diameter: | 62.975 mm (2.4763 in) | |
Crankpin diameter: | 49.974 mm (1.9675 in) | |
Crankshaft center distance: | 41.47-41.53 mm (1.6327-1.6350 in) |
Main bearing cap bolts tightening procedure and torque specs:
- 90-100 Nm; 9.2-10.2 kg·m; 67-74 ft·lb in two-three stages
After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.
Connecting rod bearing nut
- Step 1: 14-16 Nm; 1.4-1.6 kg·m; 10-12 ft·lb
- Step 2: Turn nuts 60-65° or 59-65 Nm; 6.0-6.6 kg·m; 43-48 ft·lb
Crankshaft pulley bolt
- 123-132 Nm; 12.5-13.5 kg·m; 90-98 ft·lb
Flywheel (M/T) or Drive plate (A/T) fixing bolts
- 83-93 Nm; 8.5-9.5 kg·m; 61-69 ft·lb
Cylinder head
The cylinder head is made of strong, light aluminum alloy which gives it good cooling efficiency. The has single overhead camshaft for each head and rocker shaft with rocker arms. The camshafts are driven by a single timing belt.
The intake valve diameter is 42.0 mm (1.65 in), the exhaust valve diameter is 35.0 mm (1.38 in), the duration is 252° for both side. The “W” series has 248° duration for both sides. The VG30ET is equipped with a hydraulic lash adjuster. Each valve uses dual valve springs.
Cylinder head | ||
Block head alloy | Aluminium | |
Valve Arrangement: | SOHC, belt drive | |
Head surface flatness | Less than 0.05 mm (0.002 in) | |
Valves: | 12 (2 valves per cylinder) | |
Intake valve timing | 252° “W” – 248° |
|
Exhaust valve timing: | 252° “W” – 248° |
|
Valve head diameter: | INTAKE | 42.0-42.2 mm (1.654-1.661 in) |
EXHAUST | 35.0-35.2 mm (1.378-1.386 in) | |
Valve length: | INTAKE | 125.3-125.9 mm (4.93-4.96 in) |
EXHAUST | 124.2-124.8 mm (4.89-4.91 in) | |
Valve stem diameter: | INTAKE | 6.965-6.980 mm (0.2743-0.2748 in) |
EXHAUST | 7.945-7.960 mm (0.3128-0.3134 in) | |
Valve spring free length: | OUTER | 51.2 mm (2.016 in) |
INNER | 44.9 mm (1.768 in) | |
Camshaft cam height: | INTAKE |
39.607-39.657 mm (1.5593-1.5613 in) 39.537-39.727 mm (1.5566-1.5641 in) |
EXHAUST |
39.607-39.657 mm (1.5593-1.5613 in) 39.537-39.727 mm (1.5566-1.5641 in) |
|
Camshaft journal diameter: | 46.935-46.955 mm (1.8478-1.8486 in) | |
Head tightening procedure and torque specs:
- Step 1: 39 Nm; 4.0 kg·m; 29 ft·lb
- Step 2: 123 Nm; 12.5 kg·m; 90 ft·lb
- Step 3: Loosen all bolts completely
- Step 4: 34-44 kg·m; 3.5-4.5 kg·m; 25-33 ft·lb
- Step 5: Turn all bolts 65-70° or to 123 Nm; 12.5 kg·m; 90 ft·lb
Camshaft sprocket bolts
- 78-88 Nm; 8.0-9.0 kg·m; 58-65 ft·lb
Maintenance data
Compression pressure | |
Standard | 11.9 kg/m2 (169 psi) / 300 rpm |
Minimun | 8.8 kg/m2 (125 psi) / 300 rpm |
Compression differential limit between cylinders | 1.0 kg/m2 (15 psi) / 300 rpm |
Oil system | |
Oil consumption , L/1000 km (qt. per miles) | up to 0.5 (1 qt. per 1200 miles) |
Recommended engine oil | 5W-30, 10W-30, 10W-40, 20W-40, 20W-50 |
Oil type API | API SF |
Engine oil capacity (Refill capacity) |
With filter change 4.0 l (4-1/4 Us. qt., 3-1/2 Imp. qt) Without filter change 3.3 l (3-1/2 Us. qt., 2-7/8 Imp. qt.) |
Oil change interval, km (miles) | Every 12,000 (7,500) |
Ignition system | |
Spark plug |
Standard type: NGK BCPR6E-11 Hot type: BCPR5E-11 Cold type: BCPR7E-11 |
Spark plug gap | 1.0-1.1 mm (0.039-0.043 in) |
Vehicle applications
Model | Years Produced |
Nissan 300ZX Turbo (Z31) | 1984–1989 |
Nissan Leopard | – |
Nissan Gloria (Y30, Y31) | – |
Nissan Cedric (Y30, Y31) | – |
Nissan GTP ZX-Turbo Racecar | – |
We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.
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