OCV/VVT and filter removal need oil drained?

[tmontague]

Originally Posted by dogsridewith

Wow. This cure is important to know, and first I've seen here where a number of engine rattle at start-ups have been posted. What did you use for the flush? Would it also tend to remove the carbon causing stuck piston rings?

It could also be something as simple as a different brand of oil at the oil change performed after the flush. This is well known to quiet down an engine and vise versa. If there was a true blocked oil passage to the vvt solenoid then a corresponding code would likely be thrown. I wouldn't necessarily be going crazy with flushes due to one experience