1. Dual VVT-i. The dual VVT-I system adjusts timing on the intake and exhaust camshafts. This technology was first introduced in 1998 on the RS200 Altezza's 3S-GE engine. It is also found on Toyota's new generation V6 engine, the 3.5L 2GR-FE that debuted on the 2005 Toyota Avalon.
Pentastar 3.6L Common Problems. Some of the most common issues with the Dodge, Jeep, Ram, Chrysler 3.6 Pentastar engine include: Cylinder head (2011-2013) Rocker arms. Cooling system. Oil pump. Below we break down each of these problems in-depth. It's a good time to add a few quick notes.
2AR-FE Engine Problems and Reliability. The engine turned very good. We didn't find any noticeable problems or defects. The engine is featured by a knocking sound from the VVTi system when it is cold, but this doesn't affect reliability and longevity. Cylinder block longevity limits the engine life, and it is about 150-200k miles.
Dual VVT-i: Turbocharging: no: Recommended engine oil: 5W-20: Engine oil capacity, liter: 3.4: Fuel type: petrol: Euro standards: EURO 3/4/5: Weight, kg: 99: Most Common 2NR-VE engine Problems. While the Toyota 2NR-VE engine generally exhibits commendable reliability, a few concerns have emerged among users:
7. Toyota Model: Corolla T-spirit 1.6 2002. Posted April 30, 2005. I have read lots of threads regarding heavy oil consumption on the various. versions of the VVT1 engine. In my case it concerns the 1.6 VVTI fitted to a 2002 Corolla T-Spirit. This engine is consuming over half a litre of oil every 1000 miles.
The Toyota 2AZ-FE is a 2.4 l (2,362 cc, 144.14 cu-in) straight-four 4-stroke natural aspirated gasoline engine from Toyota AZ-family. This engine was manufactured by Toyota Motor Company from 2000 on Kamigo Plant, Shimoyama Plant and Toyota Motor Manufacturing Kentucky, Inc. The Toyota 2AZ-FE features a lightweight aluminum block with thin cast
The 2TR-FE engine in the Mk.7 Hilux and Mk.5 HiAce used Toyota's 'Direct Ignition System' (DIS), which consisted of one ignition coil, with the igniter, for each cylinder. The ECM determined ignition timing based on sensor inputs and altered it. Applications of Toyota 2TR-FE Engine: Toyota Land Cruiser Prado (with Dual VVT-i) Toyota Fortuner A range of five engines is available in the Auris. The two petrol powerplants comprise a 96bhp 1.4 VVT-i unit and a 122bhp 1.6-litre Dual VVT-i. Both use variable valve timing technology to improve fuel efficiency and power output. Diesel buyers get to choose from three engines. The entry-level lump is the 1.4-litre D-4D, good for 89bhp. Some common issues that may arise with Dual VVT-i engines include: Timing belt or chain failure: Just like with any other engine, the timing belt or chain on a Dual VVT-i engine may break, which can cause serious damage to the engine.
The 1GR-FE engine has an aluminum cylinder block in a V arrangement at a bank angle of 60°. This engine's firing order is 1-2-3-4-5-6. Cylinder bore and piston stroke are 94.0 mm (3.7 in) and 95.0 mm (3.74 in), respectively. Compression ratio rating is 10.0:1 or 10.4:1. The engine has "spiny type" cast-iron cylinder liners.

This way they achieved the increasing of engine displacement from 2.5 to 2.7 liter. There is the same aluminum DOHC 16-valve cylinder head with hydraulic lifters. Both camshafts are equipped with variable valve timing system called Dual-VVTi. The single-row timing chain drives camshafts. The engine features the variable geometry intake manifold

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