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  1. L

    Lifters, piston slap, or normal?

    I have spent hundreds on different oils lol. Could have bought another set of lifters that's how much I spent. I am running top of the line 5w-30 redline right now, it's a moly group 5 oil with tons of detergents in it and zinc. I decided it would be the last oil I try because if it's noisy...
  2. L

    Lifters, piston slap, or normal?

    I used the manifolds that came with the 6.2. No exhaust leaks. The headers y-pipe leaked that's why I sent them in for repair.
  3. L

    Lifters, piston slap, or normal?

    Yup, 100% sure. Tried different lengths too. Truck drives awesome just tired of the noise, makes it sound like a junker. The morel drop ins on my 5.3 were quiet. Might just go back to those. When I listen to the video a few times, it's a more deep "in the block" sound vs something up top...
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    Lifters, piston slap, or normal?

    Since my 6.2 swap, my cold starts just sound terrible. I had many cammed vehicles and never heard them be this loud on cold start. They are Johnson 2110 lifters, which I heard can be noisy cold. They are quiet when fully warmed. If it was piston slap I'd just live with it, but the sound...
  5. L

    Front diff or transfer case?

    Yeah I tried the gear change to redline synthetic, didn't help. I'll likely just run it the way it is then and not worry about it. I only need 4x4 in bad weather conditions anyway.
  6. L

    Front diff or transfer case?

    Hey guys, having a front diff issue I think. When I am in Auto, I can hear a whine under light acceleration. Definitely sounds exactly like differential whine. I am not sure how Auto mode works, so I wasn't sure if it was for sure the front diff or possibly the transfer case. Is Auto mode...
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    2007 Tahoe/Engine swap help

    The 6.2 vs 5.3 is night and day difference. My heads/cam/headers 5.3 did 0-60 in 7.25 seconds. My 6.2 with mods in sig did 0-60 in 5.3 seconds. So much more power that the front diff is now whining lol and my A/C compressor is going out now. The part throttle is where you get the biggest...
  8. L

    Successful sound deadening for headers?

    Got it thanks. Will report back if it makes any difference.
  9. L

    Successful sound deadening for headers?

    I've got a 2012 yukon XL SLT. Looks like there's a metal base underneath the center console plastic. Is that easy to remove? From what I read, you have to cover everything with the MLV or it's not very effective. This stuff is quite heavy as well and cost almost $300. I am starting to get...
  10. L

    Chevrolet Performance Releases A New Series Of LS3 Long-Blocks

    That's a great deal at $5k. I would have done this vs my junkyard engine because I ended up spending close to that anyway after all the gaskets/lifters etc.
  11. L

    Successful sound deadening for headers?

    Inspected the floor before committing to anything... Should the MLV replace the jute all together? I don't see how everything will fit under there if not. Also what is the black tar looking stuff on the metal? Should I put the sound deadener right over that or just try to get it on bare metal...
  12. L

    high RPM vibration when A/C is on only

    AFAIK, it is still in factory condition. Never touched by anyone.
  13. L

    high RPM vibration when A/C is on only

    It does sound like something is locking up because I can hold it at 4000 rpms and the vibration will stop after about 3 seconds every single time. So it's like it struggles to keep up but then frees itself. You know I did a ton of engine work to this thing, so I was fearing the absolute WORST...
  14. L

    high RPM vibration when A/C is on only

    Hey all, have a vibration going on. Feels like when you drive over rumble strips on the road. I thought something in my driveline was fucked, so I started poking around at the u-joints, the flywheel, and the TC. Everything looked good. I went to test today and miraculously it was not doing...
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    Successful sound deadening for headers?

    Trans fluid I stuck with GM fluid. I put redline in the rear diff and I think its whining now. Great lol. Were on a road trip and the engine noise did not pass the wife test. Cold starts sound legitimately awful, never had an LS motor this loud when cold. Kooks did offer to try to fix my...
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    Successful sound deadening for headers?

    Man I couldn't believe it. I must have spent 200 dollars at walmart over the last few months trying different combos. This is the first one that made an audible difference. I will do 5w-30 summer/0w-30 winter and do 6 month OCIs in each. Which filter are you using?
  17. L

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Threw in all redline oils Front/rear diff, transfer case, engine. Couldn't believe it, but it made a big difference in engine noise at 2k rpms and up. Much smoother/quieter. Put in my 6.2 certified starter, the 5.3 one was starting to struggle. Required removing the damn passenger side...
  18. L

    Successful sound deadening for headers?

    Ok so one sound is "solved" In addition to the resonance, my cammed valvetrain is quite loud in the cabin around 2k rpms. I put in Redline oil, which is a true ester based oil with more zinc and tons of moly. I can't believe it, but it actually solved the noise. All I hear is the resonance...
  19. L

    Successful sound deadening for headers?

    Yup! I just hate the resonance, driving me nuts. I hope the mats help!
  20. L

    Successful sound deadening for headers?

    Was gonna put the stock exhaust back on and be done with it.. Then I saw how TINY the pipes are. This will probably lose 40+ hp. No way man lol.
  21. L

    Best budget upgrades on a 5.3L rebuild?

    I can help from a power perspective... Stock 5.3 was painful, I'd floor it and it wouldn't move. 0-60 was 8.6 seconds. I hated driving it. I decided to upgrade.. Did PRC LS6 heads, a BTR truck cam, headers, and tuning. This made a nice difference in cruising power and it wasn't painful to...
  22. L

    Successful sound deadening for headers?

    Thanks. From what I read, full coverage isnt needed anyway. I think ill buy the bulk kit and use a few squares on the floor under the luxury liner. Then use the rest in each door panel and be done with it. I am also leaking at the ball socket connection and every single slip fit. Im confident...
  23. L

    Used prices and "the recall"

    This is very sad to hear, but glad you're ok. That must have been a very traumatizing moment for you.
  24. L

    6.2 Denali XL header question

    I have Kooks too. I get terrible resonance in the cabin from them. Do you hear all your valvetrain/air whooshing from yours?
  25. L

    Successful sound deadening for headers?

    Ok I won't bother installing it then. Do I even need the CLD under the MLV then?

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