adventurenali92
Full Access Member
Sounds like I may have a leak due to the PCV system clogged, similar to the OP. Thinking I should tackle that. Anyone got any advice or a walk though on how to do that?
Help me find this oil leak please!
- Thread starter John03Z71
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Were you able to get the plugged up valve cover venting again or did you purchase the revised valve cover with the improved venting? If you were able to open up the plugged up one, what was your procedure? Thanks.
Last edited:
OP
OP
John03Z71
Member
- Joined
- Mar 27, 2014
- Posts
- 43
- Reaction score
- 14
Forgive my ignorance but can you please explain a bit more about exactly where / what I should look at?
The oil leaks have slowed down considerably since I replaced the PCV valve... BUT I'm still getting "Check Oil Level" message on the dash once a week or so (which is about 300-400 miles or so for me). Could a plugged vent system be causing excessive oil consumption? No smoke from exhaust or anything.
OP
OP
John03Z71
Member
- Joined
- Mar 27, 2014
- Posts
- 43
- Reaction score
- 14
Apparently the PCV system varies on different year models from my understanding... but on my '03, I literally pulled the vacuum hose straight up and off the valve cover gasket (rear of engine on driver's side). My PCV valve came off with the hose, all I had to do was pull the old one out and put the new one in the hose, then stick the hose back on the top of the manifold. I did this in the parts store parking lot in about 2 minutes tops.
I took the valve cover to dealership and had a friend run it thru their automotive dishwasher with other parts for 30 minutes. When the tech came to get his parts he told me about the updated valve cover design. The parts department had it in stock and venting design was considerable improved, so I went with the new design. If I can find pictures showing the difference, I will post them.
Last edited:
adventurenali92
Full Access Member
So it looks like my 2006 is different.... ugh... no valve. Just a tube that’s part of the vacuum hose.... now what?
HiHoeSilver
Away!
Not sure what you're trying to do, Chase? If you're looking for a clog or something, that house just pulls off. Be careful, though, the plastic gets brittle and likes to snap at the connection on the intake.
Why not put a catch can on it?
adventurenali92
Full Access Member
I was hoping mine would have a removable pcv to clean ir replace, and maybe that might help slow the oil drips. I guess not so much...
though my oil leak is not anywhere near as serious as the OPs. It’s on a few drips a day. But it’s annoying. I don’t think a catch can would solve my oil leak.
HiHoeSilver
Away!
No, but it would catch the stuff you're suspecting to have gunked up the PCV and caused the pressure that may be contributing to your leak.
Anywho.. there is a "valve" at one end of that hose.
adventurenali92
Full Access Member
If there is it doesn’t come separately from the hose. I pulled it off yesterday. I have a new one coming in tomorrow afternoon because the opposite end where it attaches, the plastic is cracked. Thought I had a pic of the whole piece. I’ll have to take a photo tomorrow when I put the new piece on.
That’s the pics that attaches to the valve cover. There isn’t a “valve” at the other end, at least not that I can see.
A buddy of mine was having oil spray up all over the underside of his 04 Suburban, and even spraying onto the back hatch and window glass. Turned out to be a clogged oil pickup screen that was creating pressure differentials in the crankcase and sending it out the pcv system
Sent from my SM-G960U using Tapatalk
Sent from my SM-G960U using Tapatalk
Thanks for the post. Those pics show that GM has a few different design changes on the drivers side valve cover. I have never seen one like your original one at the bottom of the pic. It has 3 holes roughly 3/4" diameter in the vent chamber. I have seen the revised updated cover with the large rectangular hole.
My original 2004 valve cover has no removable PCV valve. It just has the fixed orifice in the PCV connection. The valve cover on my 04 only has 1 round 3/4" vent hole, in addition to the slotted holes that run across the bottom of the vent chamber and one tiny hole on the end where the hose connects. It looks exactly like the valve cover in this video.
I did enlarge the small hole at the end where the hose connects to 5/32", as the gentleman did in the you tube video. When I pulled mine off that hole and the slotted ones were all caked solid and not breathing venting anything. The round hole was not even visible due to caked on oil from 300k miles of use. I was not lucky enough to have access to an automotive dishwasher so I cleaned up as best as I could with rags, brake cleaner & compressed air. It is venting again, but it's a messy job.
If the OP has the same plugged up valve cover, that increased crankcase pressure could exacerbate an oil leak.
This is an interesting post and worth looking into for those of us with higher mileage rigs. Did you buddy drop the pan to clean the oil pickup screen?
Thanks for the info.
He had a shop pull the pan and the top end. Hell, they may have replaced the oil pump too iirc
Sent from my SM-G960U using Tapatalk
Steve A
Member
Looks to me if it was a restricted oil pickup screen then you would have low oil pressure to go with it along with a noisy valve train.
Exactly my thought too. I personally think it was pressure sensor leaking and the shop just didn't have a clue and started replacing parts
Sent from my SM-G960U using Tapatalk
Similar threads
