Which vacuum line needs to be removed to spray CRC GDI intake valve cleaner into for cleaning engine valve of carbon deposit?

TRUONG VU

MEMBER
2016 HYUNDAI SONATA
2.4L
4 CYL
2WD
AUTOMATIC
160,000 MILES

Hi, can you show me where the vacuum line that I should take off and spray CRC GDI intake valve cleaner into for cleaning engine valve of carbon deposit. A circled picture where it is located in the engine compartment is really helpful. Thanks

Friday, April 12th, 2024 AT 1:06 PM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,913 POSTS

I like to use the brake booster vacuum line, which is connected to the intake manifold, it is large enough to handle the cleaner. Check out the images (below). Let us know if you need anything else.

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Saturday, April 13th, 2024 AT 11:44 AM

TRUONG VU

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Hi Ken, are there any sensors on the way to the engine that may be affected by the cleaner if I use this brake booster vacuum line to clean engine? Are there other vacuum lines that is easier to access that I can also use? Thank you so much for your help.

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Monday, April 15th, 2024 AT 6:39 AM

KEN L

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You should be okay, but I have seen cleaners sometimes take out oxygen sensors but not all the time so be ready for that. I would use the brake booster hose, it works best.

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Monday, April 15th, 2024 AT 9:31 AM

TRUONG VU