TheBigOldDog

For those interested in this common problem and how to fix it, sometimes very inexpensively, go to youtube and search for the name CrazedPerformanceRepair and watch his videos, especially, Lifter Release Trick Collapsed Lifter AFM DOD GM Chevrolet Lifter Noise He even sells a tool to release the lifter without even pulling the heads. He explains in detail why this happens in the video, Determine GM v8 Block Type, Why it's Important. He also shows how to midify the VLOM.