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  1. J

    2013 Tahoe LS top end noise

  2. J

    2013 Tahoe LS top end noise

  3. J

    2013 Tahoe LS top end noise

    I'm sorry for taking so long to get back to you, I've actually been trying to work ahead so I can set aside the time to do this project. And no I have not pulled the motor apart yet, I am actually about to start right now. I was waiting to get my replacement parts in hand for the most part. I...
  4. J

    2013 Tahoe LS top end noise

    Thank you so much for the help
  5. J

    2013 Tahoe LS top end noise

    Thank you so much for that info, I wouldn't be surprised if I had more questions before it's over
  6. J

    2013 Tahoe LS top end noise

  7. J

    2013 Tahoe LS top end noise

    Well I wanted to give you guys an update, after all of the advice and time spent chasing ghosts I decided to pull the motor all the way apart and start from scratch. I've got a new cam with a little more performance, AFM delete, vvt delete, new injectors, upgraded springs, new plugs again, new...
  8. J

    2013 Tahoe LS top end noise

    here is a video of the live data, not sure if this helps anything
  9. J

    2013 Tahoe LS top end noise

    I see what your saying. The lifter that broke around the roller was cylinder #2 a non AFM lifter, the#1 was the AFM lifter that lost the pins. And actually no I didn't remove the cam. I checked it through the holes after pulling the lifters. Like I said I watched a lot of videos and read up on...
  10. J

    2013 Tahoe LS top end noise

    Ok I'm paying attention... And I appreciate the input. Before you explain this to me so that I can understand it, I wanted to throw a few things out there. My bad lifter wasn't an AFM cylinder if that matters, so I thought the standard vlom cause didn't person to me. I thought that was only if...
  11. J

    2013 Tahoe LS top end noise

    Yes why do you ask?
  12. J

    2013 Tahoe LS top end noise

    I did not change the cam but it looked fine. Neither of the 2 were stuck open though. I did plug in the mass air flow sensor, all of my grounds are hooked up and the brake booster is hooked up. The thing that gets me is that there were none of these issues before and all I did was change the...
  13. J

    2013 Tahoe LS top end noise

  14. J

    2013 Tahoe LS top end noise

    I'm sorry for leaving so much time between updates, I had to leave town for work for a month. This is where I stand currently. I've changed all of the lifters out and I know I'm going to get hell for it but I replaced everything as it was. Meaning I left the AFM intact and replaced the lifters...
  15. J

    2013 Tahoe LS top end noise

    I wanted to give you an update this far too show what I'd found once I got to the lifters. Here are some photos. I did take photos of the cam shaft also. Believe it or not there was no damage to the cam. I don't have any idea where the missing pieces of metal from the lifter went... I have...
  16. J

    2013 Tahoe LS top end noise

    I wanted to give you an update this far too show what I'd found once I got to the lifters. Here are some photos. I did take photos of the cam shaft also. Believe it or not there was no damage to the cam. I don't have any idea where the missing pieces of metal from the lifter went... I have...
  17. J

    2013 Tahoe LS top end noise

    Silly question I'm not sure... If half the lifters are "AFM lifters" and you replace them with regular lifters will that not allow it to kick in to "AFM" 2 mode? I think I know the answer, it probably messes the whole engine up. So if you weren't going to do the same "AFM" delete then you'd have...
  18. J

    2013 Tahoe LS top end noise

    I have gotten my gasket set and replacement lifters, torque wrench etc. what I have yet to pick up is new head bolts (which one of you good gents suggested. I do have a question though, why do i keep hearing about the afm delete when swapping lifters? What do i need to do the delete? Is it...
  19. J

    2013 Tahoe LS top end noise

    I understand what you are saying mostly, please forgive my confusion in just wrapping my head around the DOD as well as the whole AFM thing. I'm just wondering does the AFM effect the oil flow? And I'm also wondering since #2 is not one of the cylinders that is AFM controlled would this issue...
  20. J

    2013 Tahoe LS top end noise

    Hey thank you for responding, yes I was getting a misfire on #2 (P302) before I did the top end cleaning and it went away, but I'm not sure if it has returned since this lifter noise started, I'm actually not trying to run it for a second longer than necessary. Upon plugging in my computer I'm...
  21. J

    2013 Tahoe LS top end noise

    Here is the video. Hopefully it's viewable. I was not able to notice on the video but in person the tapping noise cut down to about half as loud as it was when I first started it
  22. J

    2013 Tahoe LS top end noise

  23. J

    2013 Tahoe LS top end noise

    I appreciate the input and apologize for the delay responding. The day after I posted, I was helping a buddy who had a truck on a trailer, with the tongue being held up by a jack that was only half on it. So he wanted to lift up the tongue and reset the jack so I had an 8 foot 2x4 standing...
  24. J

    2013 Tahoe LS top end noise

    Well I don't know if I have "AFM" or "DOD" but I do know how to check, I'm embarrassed to say that once I learned how to check if it was present I've had so much else to demand my attention. I did pull the valve cover and inspect the push rods and they are fine. Even wear and in good shape. I...
  25. J

    2013 Tahoe LS top end noise

    I've got lifter/rocker noise on passengers side. I've recently done a top end clean, to remove carbon that was causing my exhaust valve on cylinder#2 to stick at low rpm. It worked, I no longer have a misfire. About 3 days later I started getting a light tapping sound. I thought I needed to...

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