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The problem I see is he doesn't know if the cam deviation was bouncing, just got some meaningless single time deviation figures. The fact that it was a "candidate" could mean that it was seen to be of a type that could be replaced. Or the mechanic saw bouncing. But we don't know which.
You can't tell much from the VIN or engine number as to which generation of bearing is in the unit, gotta have the trans off and look at the bearing cover. Ask the mechanics who have been surprised at what they found actually in the engine wasn't what they had ordered.
The mechanic is just covering himself with the "other things could be wrong" comments after the AOS replacement. He didn't say he cleaned the intake and throttle body.
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