Re: 06 Hemi burnt valve? runs rough
The symptoms don't sound like an engine running well besides having a valve issue.
A V8 with only one burnt valve wouldn't drive drastically different to a healthy engine.
5.7's do NOT have a history of valve failures.
Have you had the codes cleared/reset?
Yes, a valve issue WILL show up on a comp test. Subsequent "wet" comp test can be done to ascertain if the bottom or top end has the issue.
Dealer is too keen to take the head off. Diagnose first, then fix. Too many mechanics shops are packed to the rafters with dickheads these days, the type who take gambles, with YOUR money.