Over Heating 2008 770EFI Polars Crew Cab

[Iron Web]

I have no clue on which direction to go. I bought this rig and thought I was getting a great deal but it has been a head ache. Do these things over heat often? If so what should i be looking for. I want to resolve this so I can use my car. Should have not sold my Rhino. Just trying to build a hunting wagon. Also the rear differential was cracked on the lock and unlock side for the turf control. Is this a common break or just not my lucky day? Any and all help would be appreciated

 

[1910RLEARD]

IRON WEB,
HERE IS WHAT YOU CAN LKOK FOR. ON THE OVERHEATING ISSUE I WOULD WOULD FIRST LOOK AT THE FAN RELAY. THIS IS A COMMON PROBLEM. THEY RELAY BECOMES WEAK AND CAN NOT KEEP THE FAN RUNNING LONG ENOUGH TO BRING DOWN THE TEMP OF THE MOTOR. ALSO I HAVE SEEN WERE POLARIS PUTS IN THE WRONG AMPERAGE OF A RELAY FROM THE FACTORY. THIS WORKS FOR A LITTLE WHILE UNTIL THE FAN MOTOR BREAK'S IN A CAUSES MORE DRAW. IT SHOULD HAVE A 20AMP RELAY BREAKER IN IT.
I HAVE REPLACED ABOUT 10 REAR DIFF'S MY SELF. EVER ONE IS FROM 2007 AND UP WHEN THEY CHANGED THE STYLE OF REAR DIFF'S. ONCE DIFF'S WERE REPLACED WITH A NEW ONE THERE WAS NO MORE PROBLEM'S. I PERSONALLY THINK THE SPRING KEEPING THE DIFF LOCK DOG IN PLACE IS WEAK AND ALLOWS THE DIFF TO LOCK UP AT HIGHER RPM'S AND SPEED. I HAD DIFF'S FAIL FROM 2HR'S UP TO 200HR'S. POLARIS SAYS THERE IS NO PROBLEM. I WAS A DEALER AND THE ONE'S UNDER WARRANTY GOT FIXED THE ONE'S OUT GOT NO LOVE ON THE SITUATION.
HOPE THIS HELPS YOU OUT. POLARIS IS A GREAT MACHINE.
PM ME WITH ANY OTHER QUESTIONS

 

[TNT]

Just bypass the fan relay run leads straight to the battery keep it always on see if it helps....thermostat not opening(check), air in lines(bleed), leak down test rent tester @ autozone, weak coolant(hydrometer test), dirty or broken coolant fins, faulty pressure cap, running lean(faulty map/idle air sensor or coolant sensor or injector, to name a few....