Quote:
Originally Posted by waypoint
The 2UZ-FE engine has an oil control valve filter as shown in the pic below from the shop manual. If your problem involves the variable valve timing system, this would be my first checkpoint...could be clogged with sludge and restricting oil flow to the VVT actuator.
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Yes, the mechanic showed me that exact picture in the his shop manual and told me the issue could be a clogged filter. After cleaning the filter, and replacing the actuator, the chatter was still present but more so since there was no residual oil in the actuator. This and other evidence such as cam wear, etc., lead him to the conclusion the that the oil flow to that side of the engine was restricted. His guess was a piece of a failed oil filter was at fault.