Strange oil in my air box

[Red_5]

I was changing the intake air filter today and noticed this oil in the air box. It has a solvent type smell, more so than engine oil at least. I do use a valve cleaner spray through the MAF before each oil change which I think is the most likely culprit. I follow the directions though and only spray when the truck is being held at 2500 RPMs so I would think it’s all being sucked in. Anyone else have this? I’ll be paying closer attention now and be better about changing the filter which I’ll start doing each time I clean the intake valves. 

[scrapen]

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Edited July 6, 2020 by scrapen

[Red_5]

34 minutes ago, scrapen said:

Sounds like you answered your own question.

If you still plan on continuing to use this product I would suggest using it after the maf. Spraying lubricant through the maf is asking for trouble, and clearly it isn’t even making it through your intake to do its job.

If I were to spray something into the intake I’d just take the clamp off at the TB and spray directly there.


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It is being used after the MAF. It has a straw that goes through the MAF and sprays on the other side. I‘m following CRC’s instructions to the letter.
 

It seems to work, since I’ve been using it the stumbling on startup is gone.

 

Im curious if anyone else is seeing this. I can’t be the only one using the product. I also don’t know for sure since I just found the stuff today, the Intake cleaner product seems to be the most likely culprit.

Edited June 11, 2020 by Red_5

[davester]

I would be worried about poking anything through the MAF grid, as on the other side are a number of very fine wires that sense air temp, which could easily be broken.

 

I've used the Seafoam product, which includes a U shaped tube that you can put in the intake just ahead of the throttle body, you can install the intake tube and start the engine/spray the product in.

[Bob2C]

It is being used after the MAF. It has a straw that goes through the MAF and sprays on the other side. I‘m following CRC’s instructions to the letter.
 
It seems to work, since I’ve been using it the stumbling on startup is gone.
 
Im curious if anyone else is seeing this. I can’t be the only one using the product. I also don’t know for sure since I just found the stuff today, the Intake cleaner product seems to be the most likely culprit.

Yep. Had same problem. Filled filter box ran down wheel well cover and dripped for a few days. I now spray it at the throttle body clamp. The intake hose is pitched towards the air box slightly. If you disconnect the tube after the MAF sensors you will probably see residue in the tubing. I did when I was inspecting.


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[14TopazZ71]

 

[Red_5]

I just did the Seafoam intake cleaner and when pulling the plastic box between the MAF and throttle body, I found what seemed more like engine oil in the bellows just after the MAF. It looks like this box has PCV hoses  on each end too so it's entirely possible that at least some of the oil I found could be some engine oil. It didn't have the solvent smell that I remember smelling in the intake airbox but who knows. 

 

The Seafoam product comes with a U shaped straw that you hook on the throttle body so it has a more direct path to the intake valves.

[M1ck3y]

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Edited July 7, 2020 by M1ck3y

[IndyRob K.]

So I have been a 6.2L 2016 engine for 4 days. I want to do a seafoam treatment cause I am sure the precious owner never did. I am a believer in catch cans but the engine already has 86000 miles on it so whats the point. I have used seafoam for over 15 years on my Vortec 2800 engine. Still has the original Cat and is at 168,000 miles. So the reason for this rambling is, I have never used the spray can seafoam, I have always used the liquid with a vinyl tube into my CAI all the way up to the throttle body. I would like to also use the liquid on the 6.2. It does not have a CAI so does anyone think I can shove a vinyl tube into one of the resonator openings and pour in from there. Watching the official seamfoam videos on youtube, I am not comfortable with shutting the truck off. I just make sure the engine is really warm and just pour in the liquid until no more smoke blows out. Like I said it has worked that way for 15 years on my older GMC and runs and idles still like a champ. Go Seafoam !!

Edited October 14, 2020 by IndyRob K.