So, I'm helping out my friend with a 2016 Silverado 5.3L. He was having problems with one of the lifters. Rather than replace the lifters he decided to do an AFM delete. Everything was going well until we got to the timing chain. We put a pin in the tensioner and guide hole to keep tension on the chain as has been suggested but it didn't work. The chain came off the crank sprocket, and we can't figure out how to get it back on. We can feel it grab one or two teeth on the sprocket but that is all. Is there a way to get it back on without pulling the oil pump and dropping the pan? I tried getting a look with a borescope but couldn't get the right angle on the camera to see anything. Someone suggested it might be possible to loosen the oil pump so we can see it from underneath. Will that work or is there another way?

 

The only reason we?re doing this is because he had bad lifters. Initially we were just gonna do the lifters but somehow one of the injectors stopped working after replacing the lifters. We removed the passenger side injectors only to find 2 of them had broken off in the head. Since we now have to pull the head he figured do the full AFM delete. The ECU has been retuned without AFM. I?m pretty sure you?d need to do that on yours. If the lifters didn?t go bad we would have left well enough alone.