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Catch can fills up quickly

Discussion in 'Engine & Drivetrain' started by Donnyd21, Oct 30, 2020.

  1. Donnyd21

    Donnyd21 TYF Newbie

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    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.
     
  2. iamdub

    iamdub Full Access Member

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    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?
     
    swathdiver, ivin74 and wjburken like this.
  3. Donnyd21

    Donnyd21 TYF Newbie

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    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.
     
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  4. Jason in DLH

    Jason in DLH Cheese Burger and Fries

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    ivin74 likes this.
  5. hcvone

    hcvone Full Access Member

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    My drag cars don't put out that much oil
     
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  6. Donnyd21

    Donnyd21 TYF Newbie

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    Apple to Oranges comparison.
     
  7. STORMIN08

    STORMIN08 Full Access Member

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    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.
     
  8. Captain Insaino

    Captain Insaino Full Access Member

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    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?
     
  9. ivin74

    ivin74 05 NBS Nali

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    How many miles are on your rig?
    X2
     
  10. Donnyd21

    Donnyd21 TYF Newbie

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    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
     

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