hayden90

Right, I can see that hindsight would make it obvious that the motor might’ve needed a rebuild, but I failed to mention in my first post that the oil changes before the lifter job looked fine (no glitter of any kind).

Please help me with this noise. 2002 GMC 2500HD 4x4 6.0 LQ4 with a 4L80e - 133,000 miles. I bought this truck back in December and since then I’ve been chasing down the sources of various noises. First was the obvious exhaust leaks; as a bandaid, I put Dorman clamps on 3 corners. After that noise was fixed, I heard a strange rattling noise that sounded like it was coming from the bottom end/bell housing. After pulling the inspection plate to check all the flex plate bolts, I could see it wasn’t cracked. To further support this, I took it to a trusted indy mechanic who confirmed the plate wasn’t cracked and that the noise instead sounded like a bad lifter (although, to me, it doesn't sound exactly like a lifter tick). I’ve done a couple ATF flushes and a MMO flush over the past month and nothing really helped much (only made it a tiny bit quieter momentarily). Finally, I broke down and pulled the heads to replace the stock lifters and trays with a full LS7 set from BTR. Now I’ve got it all back together and the rattle persists. Plus! I’ve got shimmery metallic galaxies in my oil. Looks a bit coppery in color, unfortunately. The video in the link shows the current noise and the oil I just drained: And this link shows what my oil looked like about 20-30 miles after the lifter job: