Single Row IMSB w/ double row (shallow) IMS cover (another squeal theory)

[Jake Raby]

I've been working on engines of all types since the age of 8.. Cars, trucks, tractors and jets.

I haven't heard a "good" noise yet. The engine is screaming to you that its hurting. Either you listen to it and do whats required, or it will show you who the boss is.

[Topless]

I vote a screwed up chain guide or tensioner. If you put enough miles on her, the noise is guaranteed to stop.