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'99 - '06 GM Truck Modifications
Engine & Performance
Oil in the intake
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<blockquote data-quote="PrplGld" data-source="post: 16989" data-attributes="member: 2443"><p>RE: 2005 GMC Sierra 4dr ext cab 4x4 4.8L</p><p></p><p>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.</p><p></p><p>So yesterday I got the intake off and found LOTS of oil inside the intake. I’m talking at least half a quart.</p><p></p><p>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.</p><p></p><p>Got new knock sensors & harness installed.</p><p></p><p>Check out this vid:[MEDIA=youtube]CePGNsAkcYQ[/MEDIA]</p><p>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.</p><p></p><p>I’m going to put this back together today without doing valve stem seals.</p><p></p><p>Any thoughts?</p></blockquote><p></p>
[QUOTE="PrplGld, post: 16989, member: 2443"] 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:[MEDIA=youtube]CePGNsAkcYQ[/MEDIA] 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? [/QUOTE]
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'99 - '06 GM Truck Modifications
Engine & Performance
Oil in the intake
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