Nissan VH41DE

Nissan VH41DE engineThe Nissan VH41DE is a 4.1 L (4,130 cc, 252.03 cu·in) V8 natural aspirated four-stroke air-cooled internal combustion small gasoline engine, manufactured by the Nissan Motor Corporation since 1991 to 2001.

The Nissan VH41DE engine has a V8 aluminum cylinder block, dual-overhead camshafts (DOHC) design for increased efficiency and optimal power transfer. This engine used a multi-point fuel injection system with 270 cc fuel injectors. The VH41DE engine`s heads are equipped with hydraulic lifters and used variable valve timing system (VTC) on intake camshafts.

The Nissan VH41DE engine produced 271 PS (199 kW; 267 HP) at 5,600 rpm of maximum horsepower and 377 N·m (38.4 kg·m, 277.8 ft·lb) at 4,000 rpm of peak torque.

General information

Engine Specifications
Engine model VH41DE
Production 1991-2001
Engine type 4-stroke, DOHC, V8
Displacement 4.1 L, 4130 cm3, (252.03 cu·in)
Max. horsepower 271 PS (199 kW; 267 HP) at 5,600 rpm
Max. torque 371 N·m (37.8 kg·m, 273.4 ft·lb) at 4,400 rpm
377 N·m (38.4 kg·m, 277.8 ft·lb) at 4,000 rpm
Ignition system Electronic ignition system
Fuel system Multi-port Fuel Injection
Power adder None
Firing order 1-8-7-3-6-5-4-2
Cooling system Liquid-cooled
Lubricating system Wet sump

Cylinder Block

The VH41DE has a 93.0 mm (3.66 in) cylinder bore and 76.0 mm (2.99 in) piston stroke. Compression ratio rating is 10.5:1. The engine used an aluminum cylinder block, each piston is fitted with two compression rings and a single oil ring. Connecting rod length is 147.0 mm (5.78 in), crankshaft main journal diameter is 63.960 mm (2.5181 in) and crankpin diameter is 51.970 mm (2.0461 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)
Cylinder internal diameter (standard): 93.000-93.010 mm (3.6614-3.6618 in)
Piston skirt outer diameter (standard): 92.980-92.990 mm (3.6606-3.661 in)
Number of piston rings (compression / oil): 2 / 1
Connecting rod big end diameter (standard): 55.000-55.013 mm (2.1654-2.1659 in)
Connecting rod small end diameter (standard): 24.980-25.000 mm (0.9835-0.9843 in)
Connecting rod center distance: 146.95-147.05 mm (5.7854-5.7894 in)
Piston pin diameter: 21.989-22.001 mm (0.8657-0.8662 in)
Side clearance (Top): 0.040-0.080 mm (0.0016-0.0031 in)
Side clearance (Second): 0.030-0.070 mm (0.0012-0.0028 in)
Ring end gap (Top): 0.270-0.460 mm (0.0106-0.0181 in)
Ring end gap (Second): 0.390-0.630 mm (0.0154-0.0248 in)
Ring end gap (Oil): 0.200-0.690 mm (0.0079-0.0272 in)
Number of main bearings: 5
Crankshaft main journal diameter: 63.960 mm (2.5181 in)
Crankpin journal diameter: 51.970 mm (2.0461 in)
Crankshaft center distance: 38.0 mm (1.495 in)

Cylinder Head

The Nissan VH41DE engine used aluminum cylinder head with dual overhead camshafts, 4 valves per cylinder (32 in total), double row timing chain and variable valve timing system (VTC) on the intake side. Intake valves are 38.0 mm (1.4961 in) in diameter and exhaust valves are 33.0 mm (1.2992 in).

Cylinder head
Cylinder head alloy: Aluminium
Valve arrangement: DOHC, chain driven
Valves:: 4 per cylinder (32 valves in total)
Head height: 130.7-130.9 mm (5.1457-5.1535 in)
Intake timig: 232°
Exhaust timig: 232°
Valve head diameter (INTAKE): 38.0-38.3 mm (1.4961-1.5079 in)
Valve head diameter (EXHAUST): 33.0-33.2 mm (1.2992-1.3071 in)
Valve length (INTAKE): 101.70-102.30 mm (4.0039-4.0276 in)
Valve length (EXHAUST): 102.12-102.72 mm (4.0205-4.0441 in)
Valve steam diameter (INTAKE): 6.966-6.971 mm (0.2743-0.2744 in)
Valve steam diameter (EXHAUST): 7.960-7.965 mm (0.3134-0.3136 in)
Valve spring free length (INTAKE): 49.42 mm (1.9457 in)
Valve spring free length (EXHAUST): 49.42 mm (1.9457 in)
Camshaft lobe height (INTAKE): 37.858-38.048 mm (1.4905-1.4979 in)
Camshaft lobe height (EXHAUST): 34.969-35.159 mm (1.3767-1.3842 in)
Camshaft journal diameter : 25.935-25.955 mm (1.0211-1.0218 in)

Tightening torque

Tightening torque settings
Cylinder head bolts 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°

Service Data

The SG or SH oil with a viscosity of SAE 5W-30, 10W-30 is recommended for the VH41DE, refilling oil capacity is 5.0 L (5.28 US. qt, 4.4 Imp. qt.). Recommended spark plug is NGK: PFR5G-11.

Compression pressure
Standard: 13.0 bar (13.3 kg/cm2; 189 psi)
Minimum: 10.0 bar (10.2 kg/cm2; 145 psi)
Compression differential limit between cylinders: 1.0 bar (1.0 kg/cm2; 15 psi)
Oil system
Oil consupumtion: up to 0.5 (1 qt. per 1200 miles)
Oil type: SG or SH
Recommended oil: SAE 5W-30, 10W-30
Oil capacity: 5.0 L (5.28 US. qt, 4.4 Imp. qt.)
Oil change interval: 12,000 km (7,500 miles)
Fuel system
Type: Multiport Fuel Injection
Ignition system
Type: Electronic ignition system
Spark plug: NGK: PFR5G-11
Spark plug torque: 25 N·m (2.5 kg·m, 18.4 ft·lb)

Applications

Model Years Produced
Infiniti Q45 1997-2001
Nissan Leopard 1992-1996
Nissan Cima (Y32) 1991-1996
Nissan Cima Y33 1996-2001

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