[leif20]

On an N52 with 121k miles I had the intake VVT code (June 2018). I used Gates VVS177 as my replacements ($69USD on rockauto). Problem solved, has not reappeared in the last 20kmi. Yesterday I swapped the solenoids for peace of mind, but had a lot of difficulty getting them back installed.

I re-read the first portion of the thread and I want to reiterate an important part of the installation:
- When removing, twist a little counter-clockwise. 1/8th of a turn helps a lot to loosen them.
- Opposite applies for re-installing. Twist clockwise while pushing and they will pop right in.

I used a lot of force to try and get them in without twisting, but twisting was quick and easy. Don't think I did any damage to them but they shouldn't require a ton of force to insert in the first place. I will probably clean and replace them again in 20-30k miles.