Catch can fills up quickly

[Donnyd21]

I have a 2015 Yukon, 5.3, I installed a catch can and it fills up rather quick, about 1oz every 100 miles, that’s a lot of oil it would just burn if I didn’t have this installed. It that normal for these? The oil in it smells and looks just like that, oil, no hint of other contamination like water vapor. I’ve just been pouring it back into the oil. I will mention I have DoD turned OFF in my tune.

 

[iamdub]

Wow. That's a LOT through the PCV system!

Are you sure you have it hooked up correctly and not to something like... Oh, I don't know- maybe the oil cooler circuit?

 

[Donnyd21]

I definitely have it hooked up correctly. I’m starting to think it’s normal with all the oil burning complaints on the Gen V’s.

 

[Jason in DLH]

This may or may not help (I didn’t read through it)....

https://static.nhtsa.gov/odi/tsbs/2016/SB-10083162-5448.pdf

 

[hcvone]

My drag cars don't put out that much oil

 

[Donnyd21]

My drag cars don't put out that much oil

Apple to Oranges comparison.

 

[STORMIN08]

Apple to Oranges comparison.

really ?

other than a possibility of high compression ratios, the rings allowing that much oil to pass is unacceptable. the shear lack of firing the cylinder is allowing excessive amounts of oils to hang on the walls. where as a fired cylinder seating the ring aids greatly in scraping oil back down below the rings.

 

[Captain Insaino]

My LS1 Camaro only puked into the can on high RPM accelleration/decellerations. I don't know a lot about these trucks, but is your PCV valve stuck open? Do you have a high idle? Something causing high block pressure? How many miles?

 

[ivin74]

I have a 2015 Yukon, 5.3, I installed a catch can and it fills up rather quick, about 1oz every 100 miles, that’s a lot of oil it would just burn if I didn’t have this installed. It that normal for these? The oil in it smells and looks just like that, oil, no hint of other contamination like water vapor. I’ve just been pouring it back into the oil. I will mention I have DoD turned OFF in my tune.

How many miles are on your rig?

is your PCV valve stuck open? Do you have a high idle? Something causing high block pressure? How many miles?

X2

 

[Donnyd21]

113k miles. Removing the oil fill cap during idle shows no excessive crankcase pressure. Normal idle rpm.the PCV is integrated into the valley cover, no idea how to check if it’s stuck open on these

 

[ivin74]

113k miles. Removing the oil fill cap during idle shows no excessive crankcase pressure. Normal idle rpm.the PCV is integrated into the valley cover, no idea how to check if it’s stuck open on these

The PCV valve is not integrated into the valley cover, please see attached diagram. Please change it out and report back.

 

[Donnyd21]

Part ordered, I’ll check back in a couple weeks

 

[ivin74]

You can also add a fuel filter after the pcv valve an see how much oil it collects on it. I added one on my 6.0 and you will be amazed how much oil still goes thru the catch can.

 

[ivin74]

Very interesting tread


https://www.tahoeyukonforum.com/threads/catch-can-disappointment-pics-inside.96451/page-3

 

[Abuilyas]

Mostly it is the valve cover that comes on it, the one you buy (OEM) comes with the lip rather than a hole and it makes huge difference with the oil loss if I may say.

 

[ReedR]

I definitely have it hooked up correctly. I’m starting to think it’s normal with all the oil burning complaints on the Gen V’s.

Since you have disabled

I have a 2015 Yukon, 5.3, I installed a catch can and it fills up rather quick, about 1oz every 100 miles, that’s a lot of oil it would just burn if I didn’t have this installed. It that normal for these? The oil in it smells and looks just like that, oil, no hint of other contamination like water vapor. I’ve just been pouring it back into the oil. I will mention I have DoD turned OFF in my tune.

Since the DoD is turned off it's possible that the high

I have a 2015 Yukon, 5.3, I installed a catch can and it fills up rather quick, about 1oz every 100 miles, that’s a lot of oil it would just burn if I didn’t have this installed. It that normal for these? The oil in it smells and looks just like that, oil, no hint of other contamination like water vapor. I’ve just been pouring it back into the oil. I will mention I have DoD turned OFF in my tune.

Since you have disabled DoD it's possible that the high volume oil pump is to much and is pushing the extra oil into the valve cover continuously and out the pcv valve. Specially since the oil is clean.

 

[Tiredmechanic23]

Since you have disabled

Since the DoD is turned off it's possible that the high

Since you have disabled DoD it's possible that the high volume oil pump is to much and is pushing the extra oil into the valve cover continuously and out the pcv valve. Specially since the oil is clean.

PCV valve is not in the valve cover on these engines. It is under the bottom corner of the throttle body. The 2 valve cover hookups are just breathers. They do not connect to a catch can. Though you could connect a clean side separator to them.

 

[HACK BLOCK]

post a picture of how u have it set up. since it's been said the pcv isn't a part of the valve cover then you most likely have it wrong

 

[Donnyd21]

post a picture of how u have it set up. since it's been said the pcv isn't a part of the valve cover then you most likely have it wrong

 

[Donnyd21]

New PCV installed, 225 miles later still getting quite a bit in the can: