3) What are merits and the demerits of a dual VVTi engine over the normal VVTi? Merits: as stated earlier, with Dual VVTi the engine is very smooth, and it is possible to eke out even more miles for every gallon of fuel used. Demerits: a more complex engine. It might not necessarily be more prone to failure, but simple jobs such as head removal Engines from 2015 and newer with the Dual VVT-i system have a compression ratio of 10.2 to 1 and make 164 horsepower with 181 lb.-ft. of torque. 2TR-FE Engine Issues. According to Motor Reviewer, the 2TR engine is indeed stout enough to meet Toyota's reliable legacy standards. However, given that it is a modern engine with complex electronic 1NR-FE. The 1NR-FE is a compact 1.3-litre inline-four piston engine featuring Stop & Start technology and Dual VVT-i. It was introduced into the European market in late 2008 with the Yaris XP9F. Improved engine performance combined with low emissions and fuel consumption was the principal aim during its development. The 2.4 Ecotec is a 2.4-liter four-cylinder gasoline naturally aspirated engine debuted in 2006. General Motors produced this 2.4 inline-four for a wide variety of compact and midsize vehicles such as Chevrolet Malibu, Equinox, HHR, Saturn Ion, Aura, Vue, Pontiac G5, G6, Buick Regal, and more. The 2.4 Ecotec remained on the market through 2019. 1) Toyota 3.5L V6 Oil Leaks. Engine oil leaks may come from several different areas. However, the most common oil leak on the 2GR-FE primarily affects models up to 2010. The variable valve timing (VVTi) system uses a rubber hose that feeds oil to it. The 3ZR engine has an aluminum 16-valve cylinder head with chain-driven dual overhead camshafts. Valvetrain consists of two intake valves and two exhaust valves per each cylinder, hydraulic lash adjusters, and low-friction roller rocker arms. The engine uses a roller chain with an 8 mm pitch. The 3ZR-FE engine has a dual VVT-i (Variable Valve This article will describe attributes of the original 1GR-FE engine and include details of the differences with the upgraded, 'dual VVT-i 1GR-FE' engine in turn. 1GR-FE Toyota engine. Engine Trans. Years Peak power Peak torque. Toyota Mk.7 Hilux 4.0-litre petrol V6 5sp auto 2005-15 175kW at 5200rpm 376Nm at 3800rpm. Toyota Vios 2018 Review: Engine & Performance. The Toyota Vios 1.3 E AT is powered by a 1.3-liter dual VVTi engine which is capable of cranking out 98 hp and 123 Nm of torque, works in a conjunction with a 7-speed CVT. Running with this engine, the car offers better driving experience than expected. P5kdyq.