its were a combustion engine has valves being open or closed for different amouts of time at different rpm. it stands for Variable Valve Timing. sometimes engines get choked of air or lose fuel and air from the combustion chamber before it is burnt so VVT fixes this
"What is the VVT Cam Gear Unit?"
how to change vvt solenoid 2000echo
It is a 3.6 Liter engine with variable valve timing (VVT).
Yes Toyota vehicles with a 3.3L V6 engine that has VVT-i have timing belts.
what is VVT-I
VVT is located in the front of the engine cam shaft. You may need a qualified service personnell to change it.
VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing technology developed by Toyota, similar in performance to the BMW's VANOS. The Toyota VVT-i system replaces the Toyota VVT offered starting in 24 December 1991 on the 5-valve per cylinder 4A-GE engine. The VVT system is a 2-stage hydraulically controlled cam phasing system. The Toyota motors CEO has been reported to have said, "VVT is the heart of every modern Toyota!"[citation needed]VVT-i, introduced in 1996, varies the timing of the intake valves by adjusting the relationship between the camshaft drive (belt, scissor-gear or chain) and intake camshaft. Engine oil pressure is applied to an actuator to adjust the camshaft position. Adjustments in the overlap time between the exhaust valve closing and intake valve opening result in improved engine efficiency.[1] Variants of the system, including VVTL-i, Dual VVT-i, VVT-iE, and Valvematic, have followed.
On most 4 cylinder Nissans, the solenoid for the VVT is located at the front passenger side of the cylinder head.
Variable valve timing.
To repair the Variable Valve Timing (VVT) system on a 1999 Lexus RX300, first, diagnose the issue using an OBD-II scanner to check for any trouble codes. Common repairs may involve replacing the VVT sensor, cleaning or replacing the VVT solenoid, and ensuring that the timing chain and gears are in good condition. Additionally, check the oil level and quality, as low or dirty oil can affect VVT performance. If necessary, follow the manufacturer's service manual for detailed repair procedures.
No, only 2000 and up
no