2019 valve clean

[Mx2491]

So I have a 2019 Tahoe 5.3 4x4 and in my research to find a solution to my rough idle, I’ve come across many having success cleaning their valves with CRC or seafoam cleaner. I’m not mechanically gifted so I’m having issues on where/how to get the cleaner into the engine or if there is a gm service that would cover this procedure… any help would be appreciated thanks!

 

[Rygrego]

I use the PCV hose that feeds into the intake manifold. That is where the oil vapors are introduced so why not the cleaning solution. So far has worked perfectly.

 

[Mx2491]

I use the PCV hose that feeds into the intake manifold. That is where the oil vapors are introduced so why not the cleaning solution. So far has worked perfectly.

Not sure I understand what hose you’re talking about, do you have any pictures?

 

[Rygrego]

PCV valve is just to the right below the throttlebody on the intake manifold. Disconnect host from the valve run the engine at about 2500 rpm and spray CRC intake valve cleaner in the hose at short bursts or until the engine stumbles, continue until can is empty. Follow instructions on the can after that.

 

[Hobert]

Disconnect the PCV line at the front of the block, near the throttle body. keep the other end of the line where the arrow is pointing attached.

 

[Mx2491]

Disconnect the PCV line at the front of the block, near the throttle body. keep the other end of the line where the arrow is pointing attached.View attachment 351239

Thanks for the help guys. So it looks like I just remove that gray “U” clip and the hose should come off? And then as I’m understanding I would spray away from the arrow into the hose portion and no spray to the “right” into the “L” clip/connector?

Mine looks a little different due to some sort of bunch of cables running through.

 

[Hobert]

That is the hose, the picture had the cabling on top of it removed. That side of the hose id to remain on. You need to follow the hose to the front of the engine and remove it there. You leave the side on pointed to by the red arrow. Then spray in the hose. You will need to take off the air box in front of the throttle body to get to the other end. Look at catch can installs to see how to get to it.

 

[Mx2491]

That is the hose, the picture had the cabling on top of it removed. That side of the hose id to remain on. You need to follow the hose to the front of the engine and remove it there. You leave the side on pointed to by the red arrow. Then spray in the hose. You will need to take off the air box in front of the throttle body to get to the other end. Look at catch can installs to see how to get to it.

Thanks for the info I’ll be sure to check out the catch can installs and hopefully I can figure out how to get the air box off too. I appreciate the help!!

 

[LT1ZOB]

I run catch cans on all my cars. I know some people on forums are anti-catch can, but I’ve ripped apart and build a couple motors. I’d never go without a catch can on a DI motor. Pulled the supercharger lid on my 19 Z06 a couple months back after just 4K miles, and found more oil than I expected around the cooling bricks. Do yourself a favor, get a catch can

 

[THarber]

I add Marvel Mystery oil into my fuel every once in a while. I've not had my 19 apart but in all my other vehicles, including BMW's its always worked. A catch can is an easy install, took me less than 15 minutes and is pretty much plug and play if you but the right setup.

Tim

 

[Mx2491]

I add Marvel Mystery oil into my fuel every once in a while. I've not had my 19 apart but in all my other vehicles, including BMW's its always worked. A catch can is an easy install, took me less than 15 minutes and is pretty much plug and play if you but the right setup.

Tim

Sounds good I’ll check it out thanks!

 

[tom3]

I add Marvel Mystery oil into my fuel every once in a while. I've not had my 19 apart but in all my other vehicles, including BMW's its always worked. A catch can is an easy install, took me less than 15 minutes and is pretty much plug and play if you but the right setup.

Tim

Is your '19 a 5.3? Which can did you buy? Did it come with instructions for your exact setup?

 

[Rygrego]

I add Marvel Mystery oil into my fuel every once in a while. I've not had my 19 apart but in all my other vehicles, including BMW's its always worked. A catch can is an easy install, took me less than 15 minutes and is pretty much plug and play if you but the right setup.

Tim

Marvel Mystery Oil or any fuel system cleaner will not help keep the intake valves on a Direct Injection engine clean. It is introduced directly into the cylinders bypassing the intake valves that would be cleaned in a port engine by the fuel being sprayed on the back side of the intake valves. The catch can is your best bet as it's the crankcase oil being introduced via the PCV system that causes the valve deposit issues.

 

[Bob2C]

I have used amsoil power foam through the throttle body every 10k miles. No clue if it works but after the heat soak it smokes like crazy, sets off the blinking check engine light which are misfires but clear up after a few miles. I really can’t say if it does anything. Mine always had a crappy idle so I raised it to 600RPM and it’s been fine since. I also use Marvel in the gas at every fill up. 12 oz per tank. Been using that for years in all my cars and never had one issue with any fuel related part. Again no clue if it does a thing. Like others stated it will not clean valves due to the GDI design.

 

[ptm82379]

I read up on this after finding your thread. I really like the idea behind this with the direct injection setup.

How do you use it? Do you disconnect the air intake plumbing and spray directly into the TB while it's running?