this engine is on my fathers 520 ranger he just put it on a month ago. ITS a 2007 engine when he runs 4-5 miles at 5000+ rpms it over heats and computer shuts down to 1200 rpms, dealer cant figure it out replaced water pump but did not solve problem. any help would greatly appreciated. BRP supposed to send special tech to look at it but dont know when. thanks in advance.![]()