This Usually Depends On The Local Shop. If They Are Good And Reputable Then Maybe They Did A Good Job. And If Not, Your Guess Is As Good As Mine. Typically All Engines Opperate On The Same Basic Principle Unless It Is Based Off Of The Wankle Set Up. More Commonly Known As The Rotary Engine. A Good Mechanic Can Pretty Much Rebuild Anything Well As Long As They Have The Specs. As To The Replacement By Other Simaliar Engine's That Very Well Could Be Depending On The Year Of Replacement. In That Case Maybe They Debugged All The Flaws In Those Unlike In Previous Models. It's All Speculation Really.

Anthony