Infiniti QX56 (2004-2010)

Infiniti QX56 (1 generation)The Infiniti QX56 (JA60) is a first generation of full-size sport utility vehicle (SUV) manufactured by the Infiniti division of Nissan Motor Company since 2004 to 2010.

The QX56 was based on the Nissan F-Alpha platform and was equipped with 5.6 L V8 engine VK56DE and an electronically controlled 5-speed automatic transmission with a driver-adaptive learning algorithm. The QX56 was available in rear-wheel or four-wheel drive versions.

The engine has an aluminum cylinder block with low-friction molybdenum-coated pistons and an aluminum head with DOHC (Dual overhead camshaft) design and four valves per cylinder. Each cylinder in the engine was lined with cast iron. The VK56DE has an electronic throttle, ignition system with individual coils on each spark plug and engine-speed-sensing variable-assist power rack-and-pinion steering. The first generation of the engine was not equipped with any valve timing control system, the version after 2007 has CVTC (Continuous Variable Valve Timing Control) system on intake shafts.

The VK56DE engine cylinder bore and piston stroke is 98.0 mm (3.86 in) and 92.0 mm (3.62 in), respectively. Compression ratio rating is 9.8:1. The QX56 produced from 315 HP (235 kW) to 320 HP (240 kW) and 390 lb⋅ft (530 N⋅m) to 393 lb⋅ft (533 N⋅m).

Engine Specifications

Infiniti QX56 Engine Specifications
Engine codeVK56DE
LayoutFour stroke, V8
Fuel typeGasoline (petrol)
Displacement5.6 L, 5,552 cc (338.80 cu in)
Cylinder block alloyAluminium
Cylinder bore98.0 mm (3.86 in)
Piston stroke92.0 mm (3.62 in)
Compression ratio9.8:1
Block head alloyAluminium
Valve Arrangement:DOHC, chain drive
Valves:32 (4 valves per cylinder)
Intake valve timing: W/o CVTC: 230°
With CVTC: 232°
Exhaust valve timing: W/o CVTC: 232°
With CVTC: 244°
Intake valve head diameter:37.0 mm (1.457 in)
Exhaust valve head diameter:31.2 mm (1.228 in)
Fuel systemMulti Point Fuel Injection
Power output From 2004 to 2006: 315 HP (235 kW) at 4,900 rpm
From 2007 to 2010: 320 HP (240 kW) at 5,200 rpm
Torque output From 2004 to 2006: 390 lb⋅ft (530 N⋅m) at 3,600 rpm
From 2007 to 2010: 393 lb⋅ft (533 N⋅m) at 3,400 rpm
Firing order1-2-3-4-5-6
Engine weight225 kg (496 lbs)

Top speed and fuel consumption

Top speed and Fuel consumption
Top speed180 km/h (112 mph)
Fuel consumption (city)~ 18.1 l/100 km (13 mpg U.S.)
Fuel consumption (highway)~ 12.5 l/100 km (19 mpg U.S.)
Fuel consumption (combined 50/50)~ 15.6 l/100 km (15 mpg U.S.)

Maintenance data

Valve clearance (HOT)*
Intake valve0.304-0.416 mm (0.012-0.016 in)
Exhaust valve0.308-0.432 mm (0.012-0.017 in)
Compression pressure
Standard15.5 kg/m2 (220 psi) / 200 rpm
Minimun13.5 kg/m2 (192 psi) / 200 rpm
Compression differential limit between cylinders1.0 kg/m2 (15 psi) / 200 rpm
Oil system
Recommended engine oil 5W-30, 10W-30, 10-W40
Oil type APIAPI Certification Mark
Engine oil capacity (Refill capacity) With filter: 6.5 l (6.8 US. qt., 5.75 Imp. qt.)
Without filter: 6.2 l (6.5 Us. qt., 5.5 Imp. qt.)
Oil change interval, km (miles)Every 6,000 (7,500)
Oil Pressure, kPa (kg/cm 2, psi) Idle speed: More than 98 (1.0, 14)
2,000 rpm: More than 294 (3.0, 43)
Cooling system
Recommended coolantGenuine NISSAN Long Life Anti-freeze coolant or equivalent
Coolant capacity14.4 L (15.2 US. qt., 12.6 Imp. qt.)
Ignition system
Spark plugNGK: DILFR5A-11
Spark plug gap1.1 mm (0.043 in)

*Valve clearance adjustment data is here.

Vehicle dimensions and weight

Infiniti QX56 (2004-2010) dimensions and weight
Overall length5,255 mm (206.9 in)
Overall width 2004-2007: 2,001 mm (78.8 in)
2008-2010:: 2,021 mm (79.6 in)
Overall height
(with roof rack)
2004-2007: 1,976.8 mm (77.8 in)
2008-2010: 1,948 mm (76.7 in)
2004-2006: 1,997.7 mm (78.7 in)
2008-2010: 1,968 mm (77.5 in)
Front tread width 2004-2007: 1,725 mm (67.9 in)
2008-2010: 1,729 mm (68.1 in)
Rear tread width 2004-2007: 1,725 mm (67.9 in)
2008-2010: 1,729 mm (68.1 in)
Wheelbase3,130 mm (123.2 in)
Curb weight2,539 kg (5,597 lb)
Payload638 kg (1,407 lbs)
Minimum Running Ground Clearance (at front suspension)
With standard undercover
254.8 mm (10.03 in)273.7 mm (10.77 in)
With oil pan skid plate
250.5 mm (9.86 in)269.5 mm (10.61 in)
2008-2010211.2 mm (8.3 in)232.0 mm (9.1 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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