https://www.quora.com/What-is-the-common-cause-of-damage-in-a-VVTI-engine-like-Toyota

I can only guess. Your question would benefit from more specifics: what sort of failure are you trying to ward off? Variable valve timing with ...

https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-variable-valve-timing-vvt-solenoid

Jan 13, 2016 ... In the early to mid-1960's, American automotive giants Chrysler, Ford, and General Motors ruled the streets and drag strips across the land.

https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-variable-valve-timing-vvt-switch

Jan 13, 2016 ... The performance and fuel efficiency established by today's modern cars is possible thanks in large part to the variable valve timing system.

https://www.youtube.com/watch?v=7Ef2hYmcZzA

Jan 2, 2014 ... Why Toyota VVT-i engine may start to consume oil and how to do oil leak ... stop these excessive oil consumption problems dead in their tracks.

https://carfromjapan.com/article/car-maintenance/failing-variable-valve-timing-solenoid-symptoms-replacement/

Aug 17, 2018 ... Symptoms of a Bad or Failing Variable Valve Timing Solenoid ... So, in case of an impending variable valve timing solenoid failure, it is due to war .... I have Toyota duet ej engine starting is okay but when accelerated it shows ...

https://www.youtube.com/watch?v=VZux0W01C7M

Apr 6, 2014 ... So I nearly blew the 3.5L V6 engine in my 2008 Toyota Camry. Turns out this is a fairly common issue that really should be part of a recall.

https://www.youtube.com/watch?v=-kav2YCWMvs

Dec 22, 2017 ... What is this BAD knocking sound in Toyota VVTi engine. Years 2001 to 2018.

https://www.youtube.com/watch?v=cV8aWhHpYEk

Aug 2, 2011 ... Toyota #1 in recalls and it shows, I will stay with my push rod v8 in my 4x4 Chevy. ... how to diagnos failure of OCV? ... and I was told that I will have to replace the VVT-i Timing Gear all 4, but he just listen the engine. After seen ...

https://repairpal.com/timing-chainsprockets-may-need-replacement-due-to-wear-and-problems-with-vvti-116

Toyota Corolla Timing chain/sprockets may need replacement due to wear and problems with VVTi - 10 reports. Learn about this problem, why it occurs, and ...

https://www.autoblog.com/2016/01/13/symptoms-of-a-bad-or-failing-variable-valve-timing-vvt-solenoi/

Jan 13, 2016 ... If the VVT solenoid fails or is blocked, the lack of proper lubrication can cause the timing chain and gear to prematurely wear or break entirely.