Nissan VH41DE

Nissan VH41DEThe Nissan VH41DE is a 4.1 L (4,130 cc, 252.03 cu·in) natural aspirated V8 90° four-stroke gasoline engine from Nissan VH-family. The engine was producted since 1991 to 2001.

The VH41DE 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 VH41DE has VTC (Variable Valve Timing Control) system on intake shafts and ignition system with individual coils on each spark plug.

Compression ratio rating is 10.5:1. Cylinder bore and piston stroke are 93.0 mm (3.66 in) and 76.0 mm (2.99 in), respectively. The engine produced 271 PS (199 kW; 267 HP) at 5,600 rpm of peak horsepower. The maximum torque is 377 N·m (38.4 kg·m, 277.8 ft·lb) at 4,000 rpm.

The breakdown of the engine code is as follows:

  • VH – Engine Family
  • 41 – 4.1 Liter Displacement
  • D – DOHC (Dual Overhead Camshafts)
  • E – Multi Point Fuel Injection

General information

Engine Specifications
Engine code VH41DE
Layout Four stroke, V8
Fuel type Gasoline (petrol)
Production 1991-2001
Displacement 4.1 L, 4,130 cm3 (252.03 cu in)
Fuel system Multi Point Fuel Injection
Power adder None
Power output 271 PS (199 kW; 267 HP) at 5,600 rpm
Torque output 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
Firing order 1-8-7-3-6-5-4-2
Dimensions (L x W x H):
Weight

Cylinder block

The VH41DE 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 76.0 mm (2.99 in) and compression ratio rating is 10.5:1. The Nissan VH41DE 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: 38.0 mm (1.495 in)

Cylinder head

The cylinder head is made of strong, light aluminum alloy which gives it good cooling efficiency. The VH41DE has VTC (Variable Valve Timing Control) system on intake shafts. 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 a double row 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 232°, the exhaust duration is 232°.

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: 232°
Exhaust valve timing: 232°
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 49.42 mm (1.9457 in)
EXHAUST 49.42 mm (1.9457 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 or SH
Engine oil capacity (Refill capacity) With filter change 5.3 l (5-5/8 US. qt., 4-5/8 Imp. qt.)
Without filter change 5.0 L (5-1/4 US. qt, 4-3/8 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 1997-2001
Nissan Leopard 1992-1996
Nissan Cima (Y32) 1991-1996
Nissan Cima (Y33) 1996-2001
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