Nissan VQ40DE Engine Workshop Manual

Nissan VQ40DE Engine Repair Manual. This is a 6-cylinder, 24-valve engine with a capacity of 3954 cc (4.0 liters), driven by a timing chain. The exhaust camshafts have secondary chains for drive. Its firing order is 1-2-3-4-5-6. This 4.0 liter engine achieves a power of 200 kW (268 hp).

This is a repair manual for the Nissan NV 2500 2013 VQ40DE engine. The manual contains all the information, diagnostic procedures and mechanics of the engine. Also detailed images of its mechanical components.

• Home Page>>

• Engine type: V6
• Fuel: Petrol
• Engine code: VQ40DE
• Type: Chain
• Cars: NV, Pathfinder, Patrol, Xterra 

ENGINE RATING: 4+

The largest representative of the VQ family was developed in 2005 for SUV, produced in the USA and based on the 3.5-liter VQ35. To create a new 4-liter engine, the VQ35HR cylinder block was taken, its height was increased, a long-stroke crankshaft (piston stroke 92 mm) and new connecting rods were placed inside. This block was covered with two slightly modified heads from the VQ35DE with a variable valve timing system on the intake camshafts C-VTC. Characteristics of the shafts on the VQ40: phase 240/244, lift 10.0/9.6 mm. There are no hydraulic compensators on this engine, valve adjustment is required every 100 thousand km. VQ40DE engines were equipped with an electronic throttle valve, a lower plastic intake manifold, and a different exhaust system. The VQ40DE timing drive uses a chain, which is quite reliable.

Along with the VQ40DE, the VQ series also included other engines: VQ37VHR, VQ35, VQ30, VQ25, VQ23 and VQ20.

Problems and disadvantages of Nissan VQ40 engines

The problems of this engine are similar to those common on the 3.5 liter VQ35DE/HR. You can read about them here.