Intake Valve Cleaner : Through Vacuumn Hose ?

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Plan to use a can of CRC Intake Valve Cleaner in my Sonata GDI 2.4L engine ... The Intake Manifold is hard to get to without some disassembly of air ducts , hoses , etc. while the PCV vacuum line is SUPER easy to get to . **Would there be any coverage / exposure lessoning to each valve of the CRC Intake Valve Cleaner if I were to apply the cleaner through the PCV vacuum hose versus the Intake Manifold ? ... Thanks in advance for replies !
 
I've never done this cleaning since I don't own any car with a GDI engine.

Two videos you might find helpful

https://www.youtube.com/watch?v=AqFbDqY4TVM

And Scotty (via the brake boost line)

https://www.youtube.com/watch?v=cP7D-5iQcNo

This video has pics of the valves before and after.
https://www.youtube.com/watch?v=48JSlXlvMC0

Personally I think I would do two cleanings. One through the first video (intake air hose) and one more via the booster line. I think I would wait a week in between.
 
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I would not want to spray the Intake Valve Cleaner through a air intake tube as I'm thinking too much spray would stick to the tube where corners or turns in the air duct tube occur ?
*It's either spray the cleaner as close to the intake manifold as possible OR a shorter more direct path into the engine though a vacuum line (such as the PCV line into the engine) - again just don't know if spraying through a vacuum hose gives you even spray exposure / coverage to each intake valve ?
 
I wouldn't hesitate to spray it right in the PCV hose, if you're wondering if it's working or reaching the cylinders, just pay attention to what happens when you spray it. It'll change the engine rpm right away. I know lots of people who do it this way and I've done it too.

The only thing I'd worry about is the cleaner going more into one intake runner than all of them. Then again going through the throttle body isn't perfect either.
 
As stated you may get uneven coverage through a vacuum hose. Spray past the MAF sensor.
 
Originally Posted by JC1
I've never done this cleaning since I don't own any car with a GDI engine.

Two videos you might find helpful

https://www.youtube.com/watch?v=AqFbDqY4TVM

And Scotty (via the brake boost line)

https://www.youtube.com/watch?v=cP7D-5iQcNo

This video has pics of the valves before and after.
https://www.youtube.com/watch?v=48JSlXlvMC0

Personally I think I would do two cleanings. One through the first video (intake air hose) and one more via the booster line. I think I would wait a week in between.




The third link guy is a partial scammer, he has done 20 of these videos and uses the same valve dirt picture on a few of them and basically nothing really works. A little bit on the valve stem and a little on the radius of the valve pocket. Plus on one to two videos he seemed to take a picture from a camera into the ports with no manifold. and not a scoped probe camera, you have screw drive scratch marks that looks as if cleaned some of the larger pieces to show more cleaning to justifies more tests for click bait. I use to watch all his vids until something looked fishy and I felt SCAMMED. Walnut blasting is the way to go.
 
Originally Posted by KrisZ
A vacuum hose will most likely distribute the product unevenly to all valves. The best shot at having it somewhat equally applied is through the throttle body.


Correct - - one cylinder will get 80%-90% of the product, while the others will receive little to none.
 
Sorry if this is off topic but I always used the PCV hose on my carbureted V8s as that's what I was always told to do. Would it distribute more evenly if I spray it directly into the carburetor?
 
Originally Posted by Mainia
Originally Posted by JC1
I've never done this cleaning since I don't own any car with a GDI engine.

Two videos you might find helpful

https://www.youtube.com/watch?v=AqFbDqY4TVM

And Scotty (via the brake boost line)

https://www.youtube.com/watch?v=cP7D-5iQcNo

This video has pics of the valves before and after.
https://www.youtube.com/watch?v=48JSlXlvMC0

Personally I think I would do two cleanings. One through the first video (intake air hose) and one more via the booster line. I think I would wait a week in between.




The third link guy is a partial scammer, he has done 20 of these videos and uses the same valve dirt picture on a few of them and basically nothing really works. A little bit on the valve stem and a little on the radius of the valve pocket. Plus on one to two videos he seemed to take a picture from a camera into the ports with no manifold. and not a scoped probe camera, you have screw drive scratch marks that looks as if cleaned some of the larger pieces to show more cleaning to justifies more tests for click bait. I use to watch all his vids until something looked fishy and I felt SCAMMED. Walnut blasting is the way to go.





Thanks for letting me know about that guy.
 
*No MAF to get in the way on my Sonata - it's clear sailing from the air filter all the way to the Intake manifold . *I'll probably just bite the bullet and disassemble what I need to in order to get a clear shot into the Intake manifold in hopes of getting more even distribution of the cleaner to all intake valves .
Originally Posted by JustinH
I did this to my similar sonata. You can unclamp part of the air duct after the MAF sensor, and spray it in that way.
 
Originally Posted by ChrisD46
Plan to use a can of CRC Intake Valve Cleaner in my Sonata GDI 2.4L engine

2017 Hyundai Sonata 2.4L GDI 4 cylinder

You're going to do this on the 2017 Sonata? What's wrong with it that you think an intake cleaning will help?
 
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