What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[kbuskill]

I'd say my driving is a mix, swaying more towards highway. The 2500 miles since putting the catch can on is compiled of mostly Mon-Fri work commute, 50-60 miles round trip, 95% interstate, and this past weekend about an 800-900 mile round trip road trip.

Do you drain yours hot or cold? Something I've noticed on past vehicles and now this time is if I drained the catch can within 30 or so mins of shutting the engine off, the result was always milky. But after the drainage sat for a while in the bottle and cooled it would get measurable darker. And then if I didn't drain it hot, but waited to drain until the engine was cool, what came out of the can was darker.

Either way, no matter what color stuff comes out, it isn't making it's way into the engine so that's a plus.


Side topic... Currently my catch can install, like most of the ones on here I've seen, the input is off the rear of the driver's valve cover, then outputs to the port on the top/center of the intake manifold. Recently when I did my DIY PVC intake tube, going into it is a hose/line which comes off the passenger side valve cover. Has anyone integrated that into their catch can as well? Unless I'm missing something, it seems you'd want to.

I usually drain it last, after the oil has been changed. My oil change probably takes a little longer than most since I have 2 big oil filters and holds about 9 quarts... about 8 get changed the other quart stays in the oil cooler and associated lines. So maybe that has something to do with it.

Have you ever looked at the milky oil after it sits for a while???

I wonder if what I am interpreting as moisture is actually just aerated oil.

Also as a side note to your side note...

The hose that goes from the passenger valve cover to your intake tube acts as the intake for the drivers side valve covers exhaust.

The vacuum produced by the intake manifold sucks the crankcase air/oil vapor out through the drivers side valve cover. It needs air to be drawn in from the passenger side valve cover in order to produce air flow through the crankcase. If you capped the passenger side valve cover you would create a vacuum on the crankcase.

The passenger side valve cover hose is considered the clean side.

Hope my explanation makes sense.

 

[Chrismnj]

Hoe makeover under way this weekend. Barely fit all the toys.

 

[Hi-psi]

Have you ever looked at the milky oil after it sits for a while???

I wonder if what I am interpreting as moisture is actually just aerated oil.

Yes, that's what I was talking about when I said that after the drainage sits for a while in the bottle it gets noticeably darker.

The hose that goes from the passenger valve cover to your intake tube acts as the intake for the drivers side valve covers exhaust.

The vacuum produced by the intake manifold sucks the crankcase air/oil vapor out through the drivers side valve cover. It needs air to be drawn in from the passenger side valve cover in order to produce air flow through the crankcase. If you capped the passenger side valve cover you would create a vacuum on the crankcase.

The passenger side valve cover hose is considered the clean side.

Hope my explanation makes sense.

Makes total sense. Total Homer Simpson D'oh moment. I just wasn't thinking about the system correctly.



Side, side, side note. I noticed that the drainage from my catch can has more of a fuel'ish smell to it than I expected. Not sure that means anything. Just an observation.

 

[kbuskill]

Yes, that's what I was talking about when I said that after the drainage sits for a while in the bottle it gets noticeably darker.





Makes total sense. Total Homer Simpson D'oh moment. I just wasn't thinking about the system correctly.



Side, side, side note. I noticed that the drainage from my catch can has more of a fuel'ish smell to it than I expected. Not sure that means anything. Just an observation.

The smell is pretty normal due to blowby from the piston rings allowing a small amount of combustion past.

You could send a used oil sample to Blackstone and have them analyze it if you are concerned about it. They can tell you how many PPM of fuel is in your oil.

 

[lowh07]

Made me a new phone background.....

 

[Tonyrodz]

Made me a new phone background.....View attachment 218187

Cool pic

 

[lowh07]

Cool pic

Punny! After 12 years she finally gets a name..... Frosty

 

[HiHoeSilver]

check this out.

https://www.facebook.com/video.php?v=251351108827145

That's badass. Link?

 

[iamdub]

Side topic... Currently my catch can install, like most of the ones on here I've seen, the input is off the rear of the driver's valve cover, then outputs to the port on the top/center of the intake manifold. Recently when I did my DIY PVC intake tube, going into it is a hose/line which comes off the passenger side valve cover. Has anyone integrated that into their catch can as well? Unless I'm missing something, it seems you'd want to.

The way the air flows through the motor, that line on the passenger side is a clean air inlet INTO the motor. There's nothing for a catch can to catch. Look at it this way: Passenger side is the mouth that breathes in, the crankcase is the stomach/****** and the driver's side is the butthole that farts out the nasty stuff. The catch can is the filter in the hose with which GM connected the butthole to the engine's "tracheotomy" so it can inhale it's own wet farts instead of spewing them into the environment.

 

[Chrismnj]

That's badass. Link?

https://phantomholsters.com