First post!
Hopefully someone has experienced..
I have a 2019 L3901 hst with 88.5 hours on the clock and changed the oil for the second time yesterday. (First owner changed it at 60hrs right before I bought it.) After I ran it for a minute post adding oil i went to check the level after shutting it back off.
When I pulled the dipstick air shot out like I was removing a valve stem core. Obviously a decent amount of crank case pressure.
Today I checked the lines from the catch can and I seem to be getting suction from the intake hose side, and very little pressure from the line that comes from the breather at the top of the valve cover.
Even with the breather side line removed from the catch can I am still getting excessive crank case pressure.. Does the breather on the top of the valve cover limit pressure? Or should it be free flowing? I hooked an old school suction gun to the line and it will collapse the hose and pull very little air with the oil fill cap off. I’ve looked at the parts diagram and don’t see anything standing out that would limit it. Getting to the breather assembly on top of the valve cover will obviously require dpf removal so wanted to check before I dig that deep..
Also noticed a slight bit of oil residue around the split pin drain on the bell housing, and this would explain it pushing oil past the rear main.
Thanks in advance for any help!
Hopefully someone has experienced..
I have a 2019 L3901 hst with 88.5 hours on the clock and changed the oil for the second time yesterday. (First owner changed it at 60hrs right before I bought it.) After I ran it for a minute post adding oil i went to check the level after shutting it back off.
When I pulled the dipstick air shot out like I was removing a valve stem core. Obviously a decent amount of crank case pressure.
Today I checked the lines from the catch can and I seem to be getting suction from the intake hose side, and very little pressure from the line that comes from the breather at the top of the valve cover.
Even with the breather side line removed from the catch can I am still getting excessive crank case pressure.. Does the breather on the top of the valve cover limit pressure? Or should it be free flowing? I hooked an old school suction gun to the line and it will collapse the hose and pull very little air with the oil fill cap off. I’ve looked at the parts diagram and don’t see anything standing out that would limit it. Getting to the breather assembly on top of the valve cover will obviously require dpf removal so wanted to check before I dig that deep..
Also noticed a slight bit of oil residue around the split pin drain on the bell housing, and this would explain it pushing oil past the rear main.
Thanks in advance for any help!