RE: 2005 GMC Sierra 4dr ext cab 4x4 4.8L
Been having persistent knock sensor codes and black smoke on an occasional start-up (Also realized I’ve been having to add oil too frequently). Everything I found concering 2-3 seconds of smoke on startup suggested a leaking valve stem seal. So I got ready to tackle 2 jobs at once: knock sensors & valve stem seals.
So yesterday I got the intake off and found LOTS of oil inside the intake. I’m talking at least half a quart.
Read a little more, now it seems everything involving oil consumption & oil in the intake is a problem with the PCV valve, or lack thereof.
Got new knock sensors & harness installed.
Check out this vid:
I have the updated driver’s side valve cover with the permanent PCV orifice. The drain holes were basically plugged. I cleaned them out with gasoline (aka solvent) and I drilled holes as seen in the video.
I’m going to put this back together today without doing valve stem seals.
Any thoughts?
Been having persistent knock sensor codes and black smoke on an occasional start-up (Also realized I’ve been having to add oil too frequently). Everything I found concering 2-3 seconds of smoke on startup suggested a leaking valve stem seal. So I got ready to tackle 2 jobs at once: knock sensors & valve stem seals.
So yesterday I got the intake off and found LOTS of oil inside the intake. I’m talking at least half a quart.
Read a little more, now it seems everything involving oil consumption & oil in the intake is a problem with the PCV valve, or lack thereof.
Got new knock sensors & harness installed.
Check out this vid:
I’m going to put this back together today without doing valve stem seals.
Any thoughts?
