Desperate help/ only vehicle

[Fless]

If you mean the flat style VLOM (pre AFM), then yes I put a new one on. Was part of my texas speed DOD kit.

No, I mean the valve cover. The original ones have that round PCV orifice but the updated ones have a rectangular one in a slightly different spot. Helps minimize oil in the intake.

 

[thefrey]

No, I mean the valve cover. The original ones have that round PCV orifice but the updated ones have a rectangular one in a slightly different spot. Helps minimize oil in the intake.

Oh, apparently today I have lost the ability to read.

Since mine is a 2013 I had the updated valve cover from factory. I believe they updated it in 2011? Not sure exactly when, though.

 

[Fless]

Oh, apparently today I have lost the ability to read.

Since mine is a 2013 I had the updated valve cover from factory. I believe they updated it in 2011? Not sure exactly when, though.

Your model year is in the TSB. See the pic and the link to the TSB in @donjetman's post:

Engine stalling, rough idle, rpm fluctuation.

I'm far from perfectionist due to lack of skill, but that sounds like something I would do. I do wonder how mine stacks up? How many miles on your truck? There are 156K on mine. I don't have a vacuum gauge...yet! I had wondered about the PCV valve since NBS LS had them but NNBS don't. Any...

www.tahoeyukonforum.com

 

[thefrey]

Your model year is in the TSB. See the pic and the link to the TSB in @donjetman's post:

Engine stalling, rough idle, rpm fluctuation.

I'm far from perfectionist due to lack of skill, but that sounds like something I would do. I do wonder how mine stacks up? How many miles on your truck? There are 156K on mine. I don't have a vacuum gauge...yet! I had wondered about the PCV valve since NBS LS had them but NNBS don't. Any...

www.tahoeyukonforum.com

Well here's where things get interesting... that's my passenger side valve cover so I don't know if the oil consumption issue was only for the driver side or if it also applied to the passenger side? I remember my driver side valve cover looking identical to the updated one that is in the link you sent.

 

[Fless]

Well here's where things get interesting... that's my passenger side valve cover so I don't know if the oil consumption issue was only for the driver side or if it also applied to the passenger side? I remember my driver side valve cover looking identical to the updated one that is in the link you sent.

Yes, I see that, and the passenger side isn't necessary to be changed.

 

[j91z28d1]

I’m very grateful to all the advice. I’m 61. I had a 350k home and that much financially. Now my mother has been buying food for me and my kids have if they can. Never dreamed I’d be here and I’m a good person. She just decided to move in to someone else after 37 years. I never raised my voice to her or ever fought with her. Anyway, on with life. Weeeeeeeee! I went to the dollar store and bought a plastic bowl for 50 cents and sat in the truck and cried about it. That’s breaking a good man, but on with this thing called life.
Ok enough of all that. I appreciate you throwing suggestions. I’m a mechanical person but I’ve never done such a thing. I’m going at this in the dark. I’m old school and clueless on late model.

I don't wish that on anyone. it will break you if you let it.


as for the truck, order the release kit, pulling the intake and vlom under it isn't a ton harder than pulling the valve cover. Hopefully you can't get that lifter to release by following the video. if it does, just unplug the oil pressure sensor for now. without oil pressure it won't go into afm mode. that should give you time to get back on your feet.

 

[LsHart]

Wondering if the screen had caught some debris, that may have dropped into the oil galley when removed. (And then sent it on its' way to your lifters?) I can't see installing the screen wrong, it just drops in...

Just spit balling here. Haven't read all of this but, is the plastic cover that comes on the oil filter still on there?

 

[Don S]

While truck is down, you might want to send ecm off to get afm disabled.
Cheaper and better than disabler.

AFM Delete

Thx I had no idea about this

 

[Don S]

Just spit balling here. Haven't read all of this but, is the plastic cover that comes on the oil filter still on there?

You mean the little plastic cover that is over the oil sending unit connector? No I took it off after I installed it to keep debris out of the connection, then removed it. I still have it though.

 

[Don S]

I don't wish that on anyone. it will break you if you let it.


as for the truck, order the release kit, pulling the intake and vlom under it isn't a ton harder than pulling the valve cover. Hopefully you can't get that lifter to release by following the video. if it does, just unplug the oil pressure sensor for now. without oil pressure it won't go into afm mode. that should give you time to get back on your feet.

Thank you sir! I believe that’s my plan now.

 

[LsHart]

You mean the little plastic cover that is over the oil sending unit connector? No I took it off after I installed it to keep debris out of the connection, then removed it. I still have it though.

No, on the oil filter. They come with a clear plastic cover on them and u would be amazed at the amount of people forget to take that off. And it blocks the oil passages. In turn starve the motor of oil

 

[LsHart]

Any updates?

 

[Don S]

Any updates?

I appreciate you asking. I really need my vehicle going. It’s been too cold. I haven’t work in driveway. Takes about 2 minutes for hands to get numb. The plan is to pull heads and put new lifters in and have ecm sent off to program AFM to not be able to engage. Should be able to use my oil pressure gauge after that. I was told to pull manifolds with the heads at same time. I did sneak away to harbor freight and get a 16 dollar long 1/2 inch ratchet to remove head bolts.

 

[West 1]

I thought you had decided to use the tool to release your stuck lifter and run it as is??? It really does work. If you delete the AFM the engine will run perfectly with the factory lifters? If I had not done this twice myself I might think it is an iffy repair. It is a good repair as long as you do not need the AFM system to work. It is one heck of a lot less work and saves about $700 in parts cost. I think the needed release tool is only $25?

 

[Don S]

I thought you had decided to use the tool to release your stuck lifter and run it as is??? It really does work. If you delete the AFM the engine will run perfectly with the factory lifters? If I had not done this twice myself I might think it is an iffy repair. It is a good repair as long as you do not need the AFM system to work. It is one heck of a lot less work and saves about $700 in parts cost. I think the needed release tool is only $25?

Somewhere in all this I become scared it would not be a good idea from others. Yes I would love to know I could trust it if I could get lifter unstuck and get it back running, that it would hold up, but someone said something about being scared lifter would come apart? I’ve seen kits that were like 200 for lifters and head and vlom gaskets.
What gets me in all this is the fact I have never known my AFM to work. The oil pressure gauge has never worked so in 9 years of perfect running I figured someone else had already done away with the AFM system delete. Then I simply put a new oil sending unit in it, cranked it up, started to drive and lifted ticking which it never ever had, shut it off and hit the key and heard the bad snack and lifted stuck. Do only logical thought is the AFM decided to engage with the new sending unit within properly at 50 lbs and dropped the oil pressure on the AFM lifters and caused this freak incident. I was well on my way to 500k with no problems. I made it to 335k. I guess if I can get lifter unstuck and make sure AFM is deleted then it’s worth a try. I did see bear performance is a place to send ecm to get the AFM deleted off it for 125.

 

[LsHart]

Just be aware that if u put to much new upper stuff(as in new or refurbished heads) on a worn out bottom end you will be chasing nonstop issues. Especially with 340k.

 

[j91z28d1]

I appreciate you asking. I really need my vehicle going. It’s been too cold. I haven’t work in driveway. Takes about 2 minutes for hands to get numb. The plan is to pull heads and put new lifters in and have ecm sent off to program AFM to not be able to engage. Should be able to use my oil pressure gauge after that. I was told to pull manifolds with the heads at same time. I did sneak away to harbor freight and get a 16 dollar long 1/2 inch ratchet to remove head bolts.

just a reminder you can't put non afm lifters on a afm cam. it seems like it should work, but threads where it's been tried always turns out to have a misfire. I don't pretend to know why, just what I read cause I wanted to try it

also if you're using afm lifters the recommendation is always oem or mellings. the no name cheap ones seem to be a roll of the dice. some work, others I've seen have to go right back in and replace them.

but yes, in the ecm is a entire section just for how and when afm turns in and off. most of it looks oil pressure related. with rpm and torque request accounted for too. with a bad sensor it definitely hasn't switched to 4cyl mode

 

[Marky Dissod]

just a reminder you can't put non afm lifters on a afm cam. it seems like it should work, but threads where it's been tried always turns out to have a misfire.
I don't pretend to know why, just what I read cause I wanted to try it.

It's POSSIBLE to tune for this, but the tuner has to know how to do this specifically.

 

[hagar]

It's POSSIBLE to tune for this, but the tuner has to know how to do this specifically.

You mean know how to turn off misfire monitors? There is no spark or fuel by cylinder tuning on these platforms, so I don't see how it can be tuned for it. The issue is an imbalance in events because of different lobe profiles on the dod cylinders.

 

[hagar]

Or maybe change the knock thresholds for the dod cylinders. For sure not ideal in any way.