Intake valve cleaning from carbon build up

[skipgen]

Anyone have a pic of where to spray for the 5.0?

 

[SuperKing]

I didn't see any sensors on the 5.0 leading up to the throttle body so I did the easy thing... removed one of the air filters and sprayed it in there. I also taped up the intake to increase suction on the one I was spraying into.

Initially tried to remove the hose from the throttle body but that was too hard, felt like I was going to break something.

 

[skipgen]

I didn't see any sensors on the 5.0 leading up to the throttle body so I did the easy thing... removed one of the air filters and sprayed it in there. I also taped up the intake to increase suction on the one I was spraying into.

Initially tried to remove the hose from the throttle body but that was too hard, felt like I was going to break something.

Seems like that would get stuff on the mass airflow sensor...

 

[Andyj]

These 3.8 engines have no maf sensor so you can probably blow the CRC into any hose that sucks. Probably the same with the V8. I used the hose that runs across the top of the manifold based on the suction, access convenience and the point at which this hose enters the manifold; past the larger air ducts. The metal nipple below did not suck so it's downstream of the intake and no vacuum.

 

[Topspin]

I ran a can of CRC today:

1) Detach the vacuum hose right behind the metal hose. Simply squeeze the hose clamp and pull up while twisting left and right and it comes right off. The black nipple to which the hose is attached is about an inch long. To reattach, you simply squeeze the clamp and push it back into the attachment nipple.

2) Start the car and you will be able to feel the suction from the hose. I spayed the CRC intake cleaner in short bursts per the directions on the can.

No CEL or white smoke, or any other issues when starting the car after an hour. It did smell like rotten eggs halfway through the can. And it felt a little sluggish pulling out of the driveway but otherwise fine.

There's a noticeble improvement in idle. No more vibrations while in D, so I'm really happy with the outcome.

 

[Alfer]

I've used Redline gas cleaner in 2 of my vehicles and it has been pretty amazing at clearing out junk. Found at Advanced Auto and similar shops and not pricey at all. It has the strongest concentration of the chemical needed to erode buildup.

 

[optimagenesis]

I ran a can of CRC today:

1) Detach the vacuum hose right behind the metal hose. Simply squeeze the hose clamp and pull up while twisting left and right and it comes right off. The black nipple to which the hose is attached is about an inch long. To reattach, you simply squeeze the clamp and push it back into the attachment nipple.

2) Start the car and you will be able to feel the suction from the hose. I spayed the CRC intake cleaner in short bursts per the directions on the can.

No CEL or white smoke, or any other issues when starting the car after an hour. It did smell like rotten eggs halfway through the can. And it felt a little sluggish pulling out of the driveway but otherwise fine.

There's a noticeble improvement in idle. No more vibrations while in D, so I'm really happy with the outcome.

thank you for the pictures.

thank you for the information and pictures. (Genesis 2015 - 3.8 AWD) Alpine white - Technology package.with 120,000 kms,

for the benefit of members like to share my experience:
Cleaning the Intake valves
product used CRC- GDI cleaner. One can.

The CRC product does really work.!!!!

steps:
Bring the engine at operating temperature.

It took some time to squirt the full can into the (PVC) suction tube. quick 5 second bursts, (my daughter) helped with keep the RPM between 2000- 2100. while I emptied the whole can.Followed the steps and kept the engine running for another minute after the can was done. put the vacuum line back and put the metal clip in place. You have to be careful not to squirt the chemical. Turn off the engine, wait for the heat soak (1 hour).

Heat soak period: went for a break - and one hour later drove the car at high RPM - short bursts for 15 - 20 kms stretches. keeping the rpm high.

also put one can of Seafoam in the full tank and drove it on the highway. You will notice this CRC works. Noticed some white smoke as I drove away from my driveway. car is purring like big cat.! Idle is so smooth you hardly notice the engine is running.

The whole process took 2 hours (max) but the results are worth it. the best is yet to come. I will like to repeat the procedure after another 5000 kms (on my next oil change.) No CEL , no codes, nothing, Will monitor other vitals - but so far np. Good Luck. Thank you for sharing the process and the pictures once again. thank you .... Hayat Newmarket Ontario.

View attachment 32617View attachment 32618

 

[Husam]

Hello everyone,

I thought of sharing this post entry by one of the members which is relevant and will help in the issue of carbon build up:

BG EPR & MOA service on Genesis GDI engine? Recommended? | Genesis Forums (genesisowners.com)


It shows a method used by our fellow member Origin_G80 (genesisowners.com) (credit goes to him) and the results are astonishing.


Thanks,
Husam

 

[rroyce46]

Has anyone had a problem yet with carbon build up in our cars & @ what mileage?

 

[TinsleyC]

Has anyone had a problem yet with carbon build up in our cars & @ what mileage?

Which engine - yes in the 3.8 and 5.0 since they have been around for years, unknown on the 3.3t since it's fairly new.

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[rroyce46]

Which engine - yes in the 3.8 and 5.0 since they have been around for years, unknown on the 3.3t since it's fairly new.

Where on the Forum & @ What mileage did this occur ?

 

[TinsleyC]

Where on the Forum & @ What mileage did this occur ?

There are lots of threads. Just search for carbon, valves, clean, buildup, etc in different combinations. Here's one.

BG EPR & MOA service on Genesis GDI engine? Recommended?

Hello, I own a Hyundai Genesis 2015 - GDI engine 3.8L. - Is BG MOA safe on it? - Is BG EPR safe? - How different is the BG GDI Intake Valve Cleaner from CRC GDI Intake Valve Cleaner? MOA: Motor Oil Additive to increase the oil lifetime EPR: Engine Performance Restoration that is used before...

genesisowners.com

 

[rroyce46]

There are lots of threads. Just search for carbon, valves, clean, buildup, etc in different combinations. Here's one.

BG EPR & MOA service on Genesis GDI engine? Recommended?

Hello, I own a Hyundai Genesis 2015 - GDI engine 3.8L. - Is BG MOA safe on it? - Is BG EPR safe? - How different is the BG GDI Intake Valve Cleaner from CRC GDI Intake Valve Cleaner? MOA: Motor Oil Additive to increase the oil lifetime EPR: Engine Performance Restoration that is used before...

genesisowners.com

@ 150000 miles. I won't get to 70000 in the next 5 years. Any lower mileage carbon issues ?

 

[TinsleyC]

@ 150000 miles. I won't get to 70000 in the next 5 years. Any lower mileage carbon issues ?

I've got a new car, less than 5,000 mi. It's my first GDI.

Please search and read, there are lots of threads on the topic.

 

[Jkon]

No, not the metal tube with the 90% bend. The hose I used is the one behind your red arrow. I believe this is the vacuum hose between the brake booster nipple and the intake manifold. It runs across the top of the intake. I should have taken the picture while the hose was off.

I disconnected this hose by loosening the clamp and pulling the hose up off the rigid nipple below it, and up away from the manifold top. I then inserted the CRC can's plastic straw nozzle into the hose leading to the manifold. The vacuum suction is quite strong and sucks the stuff in well. Takes a while, i'd say close to 10 minutes to suck in the whole can. My son was in the car keeping the throttle at 2,000 rpm, and not more than 3,500 rpm per the instructions. Then a couple of revs up to 3500 rpm, and it sat for an hour. Went for a spirited drive; not fast but higher rpm in lower gears. Not much smoke came out although did get some carbon discoloration on the exhaust tips which is expected. There are YouTube videos on this process but with other cars like a Veloster.

There are other vacuum hoses you can use but this one is convenient and enters the intake manifold downstream of a bunch of stuff. I plan on doing this every other oil change. Should help reduce carbon buildup.

THANK YOU andyj!!! Did the Crc valve treatment just as you outlined(and mfg instructions on the can). NO codes and very little white exhaust was noted during the process. My 16 is just turning 20K having bought it in the fall of 19 with 13K. So maybe the low mileage and top tier gas have minimized carbon buildup this early. But suffice it to say I will be doing this process every 10-15K miles to hopefully headoff any carbon problems that might result by ignoring the issue with GDI engines. The car purrs like a cat and seems to be noticeably smoother all the way around. THANK you again for the easy access location suggestion of the suction line that runs over the manifold. Hope others on this forum can see the benefit of doing it with their cars if they are so inclined!!...John

 

[acelottski]

The 2015 Genesis 5.0 V8 does not have a MAF sensor. Our engines uses a MAP sensor, however I am not sure if that changed with later G80 models.
I will just stick the straw from the CRC can into the intake tube leading into the throttle body while keeping the intake tube in place so that engine does not shutoff while spraying small bursts of the chemical into the throttle body in such a manner that it does not stall out the engine. However, I will only do this just before my oil is to be changed to remove oil contaminated with the cleaner after the process. CRC is suppose to continue to breakup the carbon long after the initial treatment.

I am not sure about the G80 , but Honda engines throw codes for a while after using the CRC and then go away while improving engine performance. Hopefully it works the same for my 5.0 V8, however I will not use the method used in the video for application since the MAP sensor may need to be cleaned as well since it is downstream of the oily film produced by the PCV system so it could use a cleaning as well. CRC only specify not using the cleaner on MAF sensors not MAP sensors.

The CRC training video says not to let the cleaner hit the MAP sensor. By spraying it in the intake tubes, aren't you pushing right over the MAP sensor?

 

[carguy75]

The CRC training video says not to let the cleaner hit the MAP sensor. By spraying it in the intake tubes, aren't you pushing right over the MAP sensor?

I have had a change of heart since that post. I now believe that a physical cleaning is the best method for cleaning the carbon of the valve stems. I will still use CRC, but just remove the intake manifold and properly clean the valve stems with a wire brush.

So I will not be spraying any cleaner into my air intake.

 

[DLS_0]

My 2012 v6 has a little less than 50k miles on it. Since I do not know if any valve cleaning was done in the past, is it safe to use CRC cleaning as it may be the first time the valve will be cleaned? The last thing I want is to create a bigger problem than the benefits this CRC cleaner may give the car. Thanks for any input!

 

[Husam]

My 2012 v6 has a little less than 50k miles on it. Since I do not know if any valve cleaning was done in the past, is it safe to use CRC cleaning as it may be the first time the valve will be cleaned? The last thing I want is to create a bigger problem than the benefits this CRC cleaner may give the car. Thanks for any input!

Yes go ahead

 

[Crito]

Hyundai removes the MAP sensor and installs a little injector in its place for their "decarbonization service". I'm surpirsed Genesis doesn't offer the same service. Don't need it with my dual injection GV80 though.