Gear train

[Magard]

I was able to see all the springs and feel for movement with screw driver with cover on. Everything looks good. I am starting to think it’s the idler gear that runs the cam. It’s supposed to be .004 on new specs. Old specs was .010. I’ll bet it was running at .004 before. It also goes away when you pour gear oil in while running or when oil temp is cold. It seems like compressor makes it more noisy. High idle can’t hear anything. Compressor nock keeps getting louder. I think compressor is sending pulsating load into gear train and making the idler gear make noise. I’m gonna run it some more. I’m super busy right now. Maybe change compressor this weekend. What is the failure rate of bearing in idler gear. It’s it a bushing with oil pressure. This noise could be a ocd thing on my part. I listen to every little thing. The noise seem to be coming from the front high left front right where idler gear is.