MK8 PCV Retrofit Info
If you’ve been following from the beginning, then you know that this entire PCV research thing has gotten a little out of hand. The plan is to eventually do one single “this is all you need to know” video/article with links for more info for those interested. Until then, I’ve decided to make this page to at least compile all the information available, including the most up to date parts list recommendations, etc. along with some very basic info/links to help make a decision if the MK8 PCV meets your needs. The supplementary videos are linked near the bottom.
MK8 Retrofit Parts List
(Note: All prices are from the links provided as of Mar 2024)
Basic Retrofit Parts List:
06K-103-210-D (PCV hose) - 2021+ Tiguan, approximately $136
06Q-103-495-B (PCV valve) - 2022+ GTI/Golf R, approximately $64
06M-906-094 (bung) - Unknown application, approximately $13
Dorman 47395 (3/8 Vacuum cap) - not required if doing Full Retrofit, recommend sourcing something similar locally, should be < $5
Additional Parts needed for Full Retrofit with OEM style turbo outlet/OEM size charge pipes:
034 Turbo muffler delete - approximately $113
90 degree fitting - only ONE of the following two are needed, see notes
1/8npt to 3/8 barb fitting: approximately $8 - this is what I originally used though it is a pretty tight fit and works
1/8npt to 5/16 barb fitting: approximately $8 - this is recommended
1/8npt extensions - approximately $7 - may need one or both included to clear the turbo muffler. See video on Full Retrofit Specifics below for details.
If you have non-standard turbo charge pipes/cannot use the 034 TMD for Full Retrofit:
If you have a turbo that does NOT use a turbo muffler adapter or you have non-standard size charge pipes, you will need to tap for pressure somewhere between the turbo OUTLET and the THROTTLE BODY. Some charge pipes may have a 1/8npt fitting intended for water/meth injection, or you can possibly use:
- Mishimoto 1/8" hose/coupler tap
- Have a bung welded to your charge pipe if it is aluminum
- If your charge pipe is thick enough, just plain tapping for a 1/8npt fitting (and using some sealant) should work as well. Verify it's not leaking!
See the “Confirmed: Turbo Inlet Pipes can Break our PCV Systems” video below.
Videos
These are some of the more popular videos, all placed here for quick reference. The FULL PCV Playlist has a LOT more that you may like if you really want to geek out. Alternatively, you can go through the Improving the Car > Drivetrain/Cooling section of the website where these videos will be linked, along with some supplemental info to go with them in most cases (data from the videos, etc.).