Variable Valve Timing VVT Solenoid

[K03MK5]

Just had a PCV Delete Kit fitted and was advised to get the Variable Valve Timing VVT Solenoid replaced.  Is that needed?   

[ttelracs]

It's easy to remove, 2 small bolts and pull it out.

Connect it to a 12v power source or even a 9v battery (I think) and it should click and you see movement.  Use brake/clutch cleaner on it to clean and you'll hear the clicking noise as the solenoid works change from a softer sound to a harder clicking noise as it's cleaned out.

I did this the other week and I noticed it seemed to run a little smoother and pick up better, it could be just in my mind but I felt better for doing it.
Essentially if your solenoid clicks when connected to a power source, don't replace, just clean.

[K03MK5]

Thanks for the info just had a look easy job.

[ROH ECHT]

Yes...easy enough to swap it. The torque for the two N205 bolts is just 4 Nm.

Regarding the PCV delete; why disconnect the supply of vacuum to the crankcase (CC)?
CC vacuum improves sealing at the valve guides and valve seals, all other seals, and the piston rings. A PCV delete or a catch-can setup are typically done on a car which is re-designated to track use only, where it will be run mostly in boost. But if daily driving is its intended use, the engine will be healthier in the long run if CC vacuum is left alone.

Did you confirm the rear vent/breather tube is the open type (non-valved)? You don't want the valved type, with a valve, which can become stuck in the closed position.

[akbarirfan]

On what basis did they advise replacing it?

I recall C being the latest revision which identical to A.