On engines such as the 3.5-liter and 2.5-liter used in the Camry sedan, the exhaust valves also have variable timing, and those are called Dual VVT-i. 2013 Toyota RAV4. Replacing a water pump costs $70-$150 part plus $200-$350 labor plus extra coolant. We have found a number of complaints about the infotainment system failing in the 2014 model. The audio system may keep rebooting or simply stop working. Problems with the infotainment system are not isolated to Toyota.
16. blueportcat. • 2 yr. ago. Toyota VVT-i (Variable Valve Timing) only changes timing unlike Honda VTEC which can change both timing and the actual valve lift profile. The latter allows the engine to have essentially dual personality and more aggresive power gain especially during the switch over.
Sounds to me something to do with the cams. maybe the timing of the engine is out of whack and the internals are whacking each other which hopefully it isn't. Im no expert so I wouldn't fully think this is the issue just an assumption with issues with Dual vvti. The timing chain, chain tensioners, rocker arms, valve springs, vvti cams gears, etc
Solution. If you require a vehicle for heavy towing, consider upgrading to a model with a 3.4L engine. 4. Rattling or knocking noise. Toyota has acknowledged that a rattling or knocking noise in some of their 2.7's can be attributed to issues with the VVT Camshaft Timing Gear Assembly.
The Dual VVT-i system adjusts timing on both intake and exhaust camshafts. It was introduced in 1998 on the RS200 Altezza's 3S-GE engine. Dual VVT-i is also found in Toyota's 3.5-litre 2GR-FE V6 engine, first appearing on the 2005 Avalon. This engine can be found on numerous Toyota and Lexus models.
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
BMW M43B19 Engine Problems, Specs And Reliability; Nissan 5.6 V8 VK56DE Engine Reliability, Specs And Problems VVT-i: Compression Ratio: 11.1:1: 3SGE Red Top Beams horsepower: 147 kW 197 hp at 7,000 rpm: Its peculiar feature is a Dual VVTi variable timing technology. Having an output of 200 hp, the motor has identical valves to the Tvy6id.
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