Hi,
The VVT solenoid is under the valve covers, on each side. To access it, first determine which side the problem is located on (bank 1 or 2), remove the valve cover, and unbolt the solenoid.
The O-ring will likely be brittle and break. If that is the case, you will need to get a new one. Before installing the new O-ring, lubricate it with engine oil then slide it into place.
I attached the directions below for the removal and replacement. As far as cleaning, I would use something like mass airflow sensor cleaner or throttle body cleaner.
One last thought. There will be two connector pins in the solenoid. To check it, apply voltage and ground to the solenoid. It doesn't matter which pin gets the power. When you do this, make sure not to short the connectors. You should hear the solenoid actuate when power is applied. Battery voltage from the vehicle can work or you can even use a 9v smoke detector battery for the test.
Let me know if this helps or if you have other questions.
Take care,
Joe
See pics below.
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Wednesday, December 22nd, 2021 AT 6:52 PM