boomboom

I was in a accident had 17K in front end damage mostly body work, but anyway since then I have had a oil leak they can't seem to find and the serpantine belt keeps getting shredded up and making a mess of the engine burned rubber oil ect..

Question is what are my rights? I am still under warrenty and also have my insurance paying for any damage from the accident. I don't want an engine that keeps having **** go wrong, can I demand they put a new one in? What can I do here? Thanks guys