I think he is more of a threat to himself than anyone else.
What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
- Start date
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I think he is more of a threat to himself than anyone else.
Tonyrodz
Resident Resident
Noticed that too.
Hi-psi
Full Access Member
2500 miles since installing. Catch can is doing a great job of making coffee/chocolate milk. 
kbuskill
***CAUTION*** I do my own stunts!
2500 miles since installing. Catch can is doing a great job of making coffee/chocolate milk.
Just curious... I notice alot of you guys get the milky looking oil out of your catch cans... do you guys do a lot of short trips around town???
The reason I ask is mine never looks like that but I live kinda out in the sticks so trips are probably longer.
I know the milky oil is caused from moisture/condensation in the crankcase from heating and cooling and it's nothing major like a bad head gasket or anything but I was just curious.
I also make it a habit to remote start my truck and allow it to get up to operating temperature before driving it as well... perhaps that helps too.
Mine is always normal looking...
Mmmm dunkin black coffee....
I was kind of wondering the same thing I would be a bit worried if something like that was showing up, I haven't put a catch can in (yet) thought about it but if mine is using any oil it has to be pretty minuscule oil level stays the same between oil changes L94
CHOO CHOO
BackPagePhil
Mine always looks like chocolate milk. And I usually only take short trips. 10-20 miles most of the time, stop and go traffic.
kbuskill
***CAUTION*** I do my own stunts!
My new 3 chamber Magnaflow arrived today...
Came with tool box art...
A pic down the throat...
I'm also thinking about going old school and sticking an old stainless tip on her straight out the back instead of out the side corner... just to be different...
It's a 4" stainless tip that I had on my old 2 door box body S-10 Blazer.
Came with tool box art...
A pic down the throat...
I'm also thinking about going old school and sticking an old stainless tip on her straight out the back instead of out the side corner... just to be different...
It's a 4" stainless tip that I had on my old 2 door box body S-10 Blazer.
Hi-psi
Full Access Member
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.
looks clean, ready to pour it back in the engine. lol
kbuskill
***CAUTION*** I do my own stunts!
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.
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Hi-psi
Full Access Member
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.
kbuskill
***CAUTION*** I do my own stunts!
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
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Made me a new phone background.....
Tonyrodz
Resident Resident
Cool pic
lowh07
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Cool pic
Punny! After 12 years she finally gets a name..... Frosty
HiHoeSilver
Away!
That's badass. Link?
iamdub
Full Access Member
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.
