The intake system and ports are quite different, and also the engine is equipped with equal length headers. For VQ35HR 152.2 mm connecting rods were applied, and also new lightweight pistons. Also height and rigidity of cylinder block were enlarged. The engine used reinforced valve springs and valves of bigger diameter. This new engine had variable valve timing system on the intake and exhaust camshafts. In 2006 the engine was upgraded and named VQ35HR. These engines had redline on the level 7,000 RPM and they displayed 298 HP at 6,400 RPM. The camshafts themselves did not change, they remained the same: duration 248/248 deg, lift 10.59/10.59 mm. Its main difference was variable valve timing system CVTC on the intake and exhaust camshafts. The engine VQ35DE Rev up was produced specially for Nissan 350Z 35th Anniversary Edition and some versions of Infiniti G35 V35. In reality, the engines serve with no need of regulating it for quite longer than 60,000 miles of mileage (100,000 km). VQ35DE has no hydraulic lifters, so every 60,000 miles of mileage (100,000 km) you should regulate valve clearance. SUV engines were equipped with somewhat different camshafts: duration 230/232 deg, lift 9.0/9.0 mm. The camshafts have duration 240/238 deg, lift 9.57/9.57 mm. This engine has two DOHC heads, equipped with variable valve timing system CVTCS on intake camshafts. They are 95,5 mm in diameter and piston compression height is 30,1 mm.

The main differences between the early and late VQ are the following: new intake manifold, modified head ports, reinforced cylinder block, less rigid valve springs.Īs to the technical characteristics, VQ35DE is equipped with forged crankshaft with 81,4 mm piston stroke and forged connecting rods 144,2 mm long. The earliest versions (2nd generation VQ) had capacity 230-250 HP, and the later were more powerful – 260-300 HP (3rd generation). The most popular is VQ35 with capacity of 280 HP, but it is not its only version. The question, whether all VQ35DE engines are the same is asked quite often, but in reality, it is not so. VQ35DE replaced 3.0L VQ30DE (1st VQ generation). Many times it awarded the grade of the best engine of the year. VQ35 engine was developed in 2000 and since then it has become one of the most popular Nissan engines. Nissan VQ35DE engine reliability, problems and repair Normal engine operating temperature, ☌ (F)

Vq35hr timing cover leak