Took my 2010 Lincoln Navigator in for exhaust manifolds and they cut the FRAME to get access to the bottom bolts instead of following repair manual suggestions. Quoting he is allowed at his discretion. Needless to say that the Ford dealer, regional automotive engineer and the dmv all list this as structurally compromised and wrote my vehicle off. Had to goto small claims court. Still awaiting judgement. Talk to people and get a feel for their satisfaction before risking your $30,000 vehicle and turning it into a lawn ornament read more