That is a lame cop out.
These things can fail any number of ways. Eating bearings seems to be the most common. That being said, I don't know how you can enforce an arbitrary standard, using a sound file for reference. Lame.
I guess they can wait it out and spring for a new engine, when shit let's go and dumps into the heads. Tell him that.
When they did mine, it was a $6000 part. Probably much more, now. Not as expensive as a crate replacement, though.
Hemi Rocket Barge