The Nissan VH45DE is a Nissan VH45DE natural aspirated V8 90° four-stroke gasoline engine from Nissan VH-family. The engine was producted since 1989 to 2001.
The VH45DE used lightweight V8 90° aluminum block with the five-bearings crankshaft and two aluminum heads with two one-piece cast camshafts (DOHC) and four valves per cylinder (32 valves in total). The VH45DE has VTC (Variable Valve Timing Control) system on intake shafts from 1990 to 1995 and “Coil-on-Plug” ignition system with individual coils on each spark plug.
Compression ratio rating is 10.2:1. Cylinder bore and piston stroke are 93.0 mm (3.66 in) and 82.7 mm (3.26 in), respectively. The engine produced from 271 PS (199 kW; 267 HP) at 5,600 rpm to 281 PS (207 kW; 277 HP) at 6,000 rpm of peak horsepower. The maximum torque is 400 N·m (40.8 kg·m, 294.8 ft·lb) at 4,000 rpm.
The breakdown of the engine code is as follows:
- VH – Engine Family
- 45 – 4.5 Liter Displacement
- D – DOHC (Dual Overhead Camshafts)
- E – Multi Point Fuel Injection
General information
| Engine Specifications | |
| Engine code | VH45DE |
| Layout | Four stroke, V8 |
| Fuel type | Gasoline (petrol) |
| Production | 1989-2001 |
| Displacement | 4.5 L, 4,494 cm3 (274.24 cu in) |
| Fuel system | Multi Point Fuel Injection |
| Power adder | None |
| Power output |
271 PS (199 kW; 267 HP) at 5,600 rpm 281 PS (207 kW; 277 HP) at 6,000 rpm |
| Torque output |
394 N·m (40.2 kg·m, 290.4 ft·lb) at 4,000 rpm 400 N·m (40.8 kg·m, 294.8 ft·lb) at 4,000 rpm |
| Firing order | 1-8-7-3-6-5-4-2 |
| Dimensions (L x W x H): | – |
| Weight | – |
Cylinder block
The VH45DE has an aluminum block with a five-bearings crankshaft supported system. It has low-friction molybdenum-coated pistons, forged steel connecting rods, forged steel crankshaft, six-bolt main bearing caps with studs. The crankshaft journal diameter is 63.960 mm (2.5181 in), the crankpin diameter is 51.970 mm (2.0461 in).
The cylinder bore is 93.0 mm (3.66 in), piston stroke is 82.7 mm (3.26 in) and compression ratio rating is 10.2:1. The Nissan VH45DE motor has two compression and one oil control rings. The connecting rod’s length is 147.0 mm (5.79 in)
| Cylinder block | ||
| Cylinder block alloy | Aluminium | |
| Compression ratio: | 10.5:1 | |
| Cylinder bore: | 93.0 mm (3.66 in) | |
| Piston stroke: | 76.0 mm (2.99 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 5 | |
| Cylinder inner diameter (standard): | 93.000-93.010 mm (3.6614-3.6618 in) | |
| Piston skirt diameter (standard): | 92.980-92.990 mm (3.6606-3.661 in) | |
| Piston pin outer diameter: | 21.989-22.001 mm (0.8657-0.8662 in) | |
| Piston ring side clearance: | Top | 0.040-0.080 mm (0.0016-0.0031 in) |
| Second | 0.030-0.070 mm (0.0012-0.0028 in) | |
| Piston ring end gap: | Top | 0.27-0.46 mm (0.0106-0.0181 in) |
| Second | 0.39-0.63 mm (0.0154-0.0248 in) | |
| Oil | 0.20-0.69 mm (0.0079-0.0272 in) | |
| Connecting rod small end inner diameter: | 24.980-25.000 mm (0.9835-0.9843 in) | |
| Connecting rod big end diameter: | 55.000-55.013 mm (2.1654-2.1659 in) | |
| Connecting rod center distance: | 147.00 mm (5.79 in) | |
| Crankshaft main journal diameter: | 63.960 mm (2.5181 in) | |
| Crankpin diameter: | 51.970 mm (2.0461 in) | |
| Crankshaft center distance: | 41.35 mm (1.63 in) | |
Cylinder head
The cylinder head is made of strong, light aluminum alloy which gives it good cooling efficiency. The VH45DE has VTC (Variable Valve Timing Control) system on intake shafts from 1990 to 1995. The engine is equipped with an electronic throttle body, sodium-filled exhaust valves, cross-flow cooling system, hydraulic lash adjusters. The camshafts are driven by the single-row silent timing chain.
The intake valve diameter is 38.0 mm (1.47 in) the exhaust valve diameter is 33.0 mm (1.2992 in), respectively. The intake duration is 2482°, the exhaust duration is 248°.
| Cylinder head | ||
| Block head alloy | Aluminium | |
| Valve Arrangement: | DOHC, chain drive | |
| Cylinder head height: | 130.7-130.9 mm (5.1457-5.1535 in) | |
| Valves: | 32 (4 valves per cylinder) | |
| Intake valve timing: | 248° | |
| Exhaust valve timing: | 248° | |
| Valve head diameter: | INTAKE | 38.0-38.3 mm (1.4961-1.5079 in) |
| EXHAUST | 33.0-33.2 mm (1.2992-1.3071 in) | |
| Valve length: | INTAKE | 101.70-102.30 mm (4.0039-4.0276 in) |
| EXHAUST | 102.12-102.72 mm (4.0205-4.0441 in) | |
| Valve stem diameter: | INTAKE | 6.966-6.971 mm (0.2743-0.2744 in) |
| EXHAUST | 7.960-7.965 mm (0.3134-0.3136 in) | |
| Valve spring free length: | INTAKE | 47.30 mm (1.8622 in) |
| EXHAUST | 47.30 mm (1.8622 in) | |
| Camshaft cam height: | INTAKE | 37.858-38.048 mm (1.4905-1.4979 in) |
| EXHAUST | 34.969-35.159 mm (1.3767-1.3842 in) | |
| Camshaft journal diameter: | 25.935-25.955 mm (1.0211-1.0218 in) | |
Head tightening procedure and torque specs:
- Step 1: 29 N·m (3.0 kg·m, 22 ft·lb)
- Step 2: 93 N·m (9.5 kg·m, 69 ft·lb)
- Step 3: Loosen all bolts completely
- Step 4: 25-34 N·m (2.5-3.5 kg·m, 18-25 ft·lb)
- Step 5: Turn all bolts 90-95°;
Maintenance data
| Compression pressure | |
| Standard | 13.5 kg/m2 (191 psi) / 300 rpm |
| Minimun | 11.5 kg/m2 (164 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 |
| Oil type API | SG |
| Engine oil capacity (Refill capacity) |
With filter change 6.0 l (6-3/8 US. qt., 5-1/4 Imp. qt.) Without filter change 5.6 L (5-7/8 US. qt, 4-7/8 Imp. qt.) |
| Oil change interval, km (miles) | 12,000 (7,500) |
| Ignition system | |
| Spark plug |
Standard:PFR5G-11 (NGK) Hot:PFR4G-11 (NGK) Cold:PFR6G-11 (NGK) |
| Spark plug gap | 1.1 mm (0.043 in) |
Vehicle applications
| Model | Years Produced |
| Infiniti Q45 | 1990-1996 |
| Nissan President | 1990-2002 |
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