Jump to content

5.3 Afm Lifter Tick Need Knowledge

spankrz

Recommended Posts

spankrz Enthusiast

spankrz

Posted
Posted

:P:eek::mad:

 

my 07 nnbs silverado with a 5.3 and afm started a bad tick. started couple days ago, would tap on startup for around 3-5 seconds. was hauling an enclosed trailor on about a 100 mile run today, and on the second half of the run i noticed when i would pull a steep hill, it would tap. almost sounds like a manifold gasket leaking from inside the cab. it does it on startup, and when under load, so it can only get worse... i think it is the afm lifters, but i am not sure.

 

this may or may not be related, but i heard a breif grinding noise when i started on the way back, but i thought it was a wheelbearing in the trailor, and i checked and the bearing had play.

 

i need advice. how long will this thing run untill it fails? it has 140,000 miles so the powertrain warrenty doesent mean squat.

 

to top it all of, i start college classes in under a week, and this is my DD

 

i am a power freak, and do not like afm. i would like to put a 6.0/4l80 combo in , but i don't know how much would have to be changed. motor, tranny, pcm, and what else???

 

please point me in the right direction, i need all the help i can get :lol:

greentourismo Enthusiast

greentourismo

Posted
Posted

Leave it and see if it gets worse. Change your oil.Buy some ac delco engine oil suppliment. Talking about swapping a motor and trans because you have a slight lifter tick occasionally? crazy talk.....well either that or you have too much money. Ive seen cars develop lifter noise at 30,000 miles and run to 200,000 with no failure. Half the chrystlers, bmw's and volkswagens out there do it most of thier lives :P

:P:eek::mad:

 

my 07 nnbs silverado with a 5.3 and afm started a bad tick. started couple days ago, would tap on startup for around 3-5 seconds. was hauling an enclosed trailor on about a 100 mile run today, and on the second half of the run i noticed when i would pull a steep hill, it would tap. almost sounds like a manifold gasket leaking from inside the cab. it does it on startup, and when under load, so it can only get worse... i think it is the afm lifters, but i am not sure.

 

this may or may not be related, but i heard a breif grinding noise when i started on the way back, but i thought it was a wheelbearing in the trailor, and i checked and the bearing had play.

 

i need advice. how long will this thing run untill it fails? it has 140,000 miles so the powertrain warrenty doesent mean squat.

 

to top it all of, i start college classes in under a week, and this is my DD

 

i am a power freak, and do not like afm. i would like to put a 6.0/4l80 combo in , but i don't know how much would have to be changed. motor, tranny, pcm, and what else???

 

please point me in the right direction, i need all the help i can get :lol:

spankrz Enthusiast

spankrz

Posted
  • Author
Posted

it always had some, on cold starts and so on. it is just rapidly getting worse, and i am trying to sort out what i am going to do, so i can start putting back the money. trust me, im gonna run er till she blows, i just dont have a good feeling..

greentourismo Enthusiast

greentourismo

Posted
Posted
it always had some, on cold starts and so on. it is just rapidly getting worse, and i am trying to sort out what i am going to do, so i can start putting back the money. trust me, im gonna run er till she blows, i just dont have a good feeling..

 

If You had a bottom end knock you may wanna start planning the new motor your getting. try the supplement I mentioned, its great stuff. If it keeps getting worse you may have to take a look into a camshaft and new lifters.

nick3941sd Enthusiast

nick3941sd

Posted
Posted

If it is the lifters and you dont like the AFM you can look into getting rid of the AFM all together. You also said you like modding your truck so if you plan on keeping it you may want to purchace the AFM/DOD delete kit and a aftermarket cam to stop the problem and add some power while your at it. Thunder Racing is one place that sells both these items. LINK TO AFM DELETE KIT. If you do go this route you will also need a tune if you dont have one or get the truck retuned if you do.

rdnkcpa Enthusiast

rdnkcpa

Posted
Posted

If it is a stuck lifter, replacing the lifters is not too bad of a job. You'll need new head gaskets & head bolts, but you should be able to do the job pretty cheap. Order the shop manual and have at it. It will be a lot cheaper than dropping a 6.0 in it.

spankrz Enthusiast

spankrz

Posted
  • Author
Posted

greentourismo: is the oil suppliment you mentioned compatible with synthetic? i may have to give it a shot for good measure. for some reason, it has seemed to work itself out. i still get the occasional tick for a short time period on cold starts like so many of these trucks do. two days ago it had a HARD knock on cold starts. also found a friend that has a 6.0 with bout 40,000 on it with a couple lobes rounded on the cam i could trade him out of without much trouble. may not hurt to have it in the garage for a nice winter project :lol:

greentourismo Enthusiast

greentourismo

Posted
Posted

Im pretty sure its fine, have to check the bottle when you get it.It should be fine tho. I did a quick search on it and the funny thing is now they say not to use "engine oil supplement" as a supplement lol. They consider it a break in fluid only. It seems the reason for the switch (exact same product tho) is because long term can mess up catalytic converters due to high zinc levels and problems passing air care. If your really worried, throw a bottle in a few hundred miles before oil change time, but you shouldnt have any problems with the stuff.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Correct.  2019-2021 model years are serviced by a different p/n.  19420611.  Recall 2021s use 19420611.   The recall engines 2022-2024 model years are serviced with 12740076.     The difference between 19420611 and 12740076 is GM changed injector size for 2022.  The injectors are smaller on 12740076 with smaller injector bores in the cylinder heads to match the smaller injectors.  So you can't install a 19420611 in a 2022-2024, and you can't install a 12740076 in a 2019-2021.     Both engines are the replacement engine p/ns that are in the L87 recall.  So both of these are the updated engines.      
    • 2017Z
      2020 Trailboss 6.2 replacement

      By 2017Z · Posted

      Looking for advice from this group. Took my flawless 2020 6.2 TB to an unnamed shop for routine rear brakes and oil change. Tech forgot to put oil back in after the full service and needles to say, destroyed my engine.  It’s all on their shop video so they are responsible.   I had my Chevy dealer do the analysis and they confirmed its compromised and said engine replacement. The manager said they only get GM reman engines from GM with full 3 yr warranty and the one they would put in is not same as what’s they are swapping out on 21-25 for recall.    I am looking for advice why that would be a different engine because obviously I had the good 6.2 year and replacing it has my concerns with that recall for 21-15   Also what’s the pros and cons of accepting the engine swap vs telling the shop that bricked the truck to pay up so I buy a new truck. I’m concerned about stigma resale eventually if I just decide to get rid of it after the swap or other issues showing up after the swap out.  
    • GN2018
      AFM Disabler Question

      By GN2018 · Posted

      Just looked up my records.  I've never gone over 5000 miles between oil changes.  At 46K miles, I have 10 oil changes.  I hope that will help.  I also installed the disabler last year.  I've still had a few times when it didn't seem to engage (which I can tell because the start stop feature kicks in), but for the most part, I think it's working.  For some reason, GM did not include the number of cylinders running in the information screen like I had on other models.  In my Cadillac, it shows me when it's running on 4 cylinders on the fuel milage screen.  I can't find that on my '21 Denali.
    • davester
      Wiring Help, Please

      By davester · Posted

      you might read through the info on gmupfitter.com for your truck, to find a good power source.
    • Grumpy Bear
      AFM Disabler Question

      By Grumpy Bear · Posted

      Melling I believe is/was the OEM on the lifters who explored this problem some years ago. The white paper they generated on the topic indicated two items of note when I read it. 1.) They only fail on the switch. Prevent the switch, prevent the failure. 2.) The majority fail due to deposits messing up the timing of that switch. Anyway that's what I got from it.    Mine have always been active, 195K+ now, and my oil maintenance is surgically clean.    Of course this assumes good parts. That is no heat treat issue or machining flaws. I get comfortable that these issues are in the rearview mirror by about 30K. IMHO naturally. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...