The VVT solenoid has a screen on it - try changing the solenoid, its easy to get at and 1 bolt holds it in (above the PS pump). And change the oil/filter ( put a qt of AFT in after the engine is warm and let it IDLE for 10 min. Then change the oil/filter napa gold or eqiv.) using a high detergent oil / additive. Repeat after say 500 miles a couple of times and see if it goes away. Don't rely on the oil change interval system.
