On our GDI European car, I just drilled a small hole into the intake ducting, AFTER the air filter housing but BEFORE the throttle body. Just big enough for the CRC nozzle to fit.

You can seal it with some aluminum ducting tape from a hardware or home store.

 

Wow, that is brave!

#3 is the PCV line to the intake manifold.

Ummm, so this is what I should use? (Sorry for my ignorance)

 

Have you actually looked at the valves with an endoscope? The 1.5T is not known for having carbonization problems. (It’s got a very good PCV separator.)

 

Hello,
For my 2017 crv, I'm trying to locate an intake line (vacuum line) in order to do an intake valve clean with CRC). I saw this photo and I'm not sure which line goes directly to the intake.
Any help?
Thanks

#3 is the PCV line to the intake manifold.

 

Ummm, so this is what I should use? (Sorry for my ignorance)

Yes, if you inject an appropriate cleaner there it will reach the intake valves. But as mentioned previously there is little reason to inject anything in the intake manifold because Honda did a good job with their 1.5L turbo GDI engine to prevent carbon build up on the intake valves. No one to my knowledge has reported any issue with carbon build up in either the Civic or CRV forums. While there may be other issues which I won't get into, but carbon build up is not one of them.

 

You could at least clean the throttle body. Not sure exactly how on the turbo, but probably not too hard.

 

Use a decent Tier 1 gasoline so there is no need to do an intake valve clean.

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Does not help on the valve/carbon issue on GDi, but good to use, yes.

I'd say follow the MM and use a good quality oil and filter.