Nissan VQ40DE Engine


  1. Specifications
  2. Overview, problems
  3. Performance tuning

Nissan VQ40 engine specs

Manufacturer Decherd Powertrain Plant
Also called VQ40
Production 2005-present
Cylinder block alloy Aluminum
Configuration V6
Valvetrain DOHC
4 valves per cylinder
Piston stroke, mm (inch) 92 (3.62)
Cylinder bore, mm (inch) 95.5 (3.76)
Compression ratio 9.7
Displacement 3954 cc (241.3 cu in)
Power output 195 kW (265 HP) at 5,600 rpm
198 kW (269 HP) at 5,600 rpm
Torque output 381 Nm (281 lb·ft) at 4,000 rpm
390 Nm (288 lb·ft) at 4,000 rpm
Redline
HP per liter 67.0
68.0
Fuel type Gasoline
Weight, kg (lbs)
Fuel consumption, L/100 km (mpg)
-City

-Highway
-Combined
for Pathfinder
18.7 (13)
10.5 (22)

13.5 (17)
Turbocharger  Naturally aspirated
Oil consumption , L/1000 km
(qt. per miles)
up to 0.5
(1 qt. per 1200 miles)
Recommended engine oil 5W-30
5W-40
10W-30
10W-40

Engine oil capacity, L (qt.) 5.1 (5.4)
Oil change interval, km (miles) 5,000-10,000
(3,000-6,000)
Normal engine operating temperature, °C (F)
Engine lifespan, km (miles)
-Official information
-Real


400,000+ (250,000)
Tuning, HP
-Max HP
-No life span loss

400+

The engine is installed in Nissan Pathfinder
Nissan Xterra
Nissan Frontier
Nissan NV
Suzuki Equator

Nissan VQ40DE engine reliability, problems and repair

This largest VQ representative was designed in 2005 specially for SUV and produced in US only. It was developed on basis of VQ35HR cylinder block with enlarged height, camshaft with 92 mm piston stroke inside, and new connecting rods. Also the cylinder block was covered with somewhat modified VQ35DE heads. On intake camshafts these heads use variable valve timing system C-VTC. VQ40 cams have duration 240/244 deg, lift 10.0/9.6 mm. This engine has not been equipped with hydraulic lifters, so be ready to regulate the valves every 60,000 miles of mileage (100,000 km).
Also these engines use electronic throttle body, long plastic intake manifold and modified exhaust system.
They are equipped with quite reliable timing chain, it will not cause any problems. VQ40DE firing order is 1-2-3-4-5-6.
Besides this engine, VQ series also included such models as VQ37, VQ35, VQ30, VQ25, VQ23 and VQ20.

Nissan VQ40DE engine problems and malfunctions

The problems of this engine are similar to VQ35DE/VQ35HR. You can learn about them HERE.

Nissan VQ40DE engine tuning

Supercharger

Do not try turning it into high rev naturally aspirated engine, since it is created as low RPM motor for SUVs. The most reasonable way is buying VQ40 supercharger kit. Usually the one by Stillen is used. It lets gaining 90 HP more on stock internals. It will be more than enough for your SUV.
You may also add performance exhaust system and some more aggressive cams, what will give 20-30 HP yet. But more likely these performance parts are excessive.

 

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