Has anyone ever experienced overheating on their Polaris Sportsman 500? Water pump is circulating, Thermostat has been replaced, Radiator fan is operational. There is coolant in the radiator and the system has been properly bled. Symptons After a few top end runs, warning light will turn on and there is steam build up in the cooling system (Radiator and Overflow bottle) Any help in this matter will be accepted.

 

Sounds to me like you’ve covered all the basics. If it were a car I’d say it was a leaking head gasket pressurizing your cooling system but I don’t how the 500 cools the head.

 

I had a similar thing happen on my Mag 500. It turned out that there was some mud on the radiator fins (front and back)A good spraying with the hose took care of it. The mud was hardly noticable so now I clean it out real well after any ride where I have encountered mud. The same thing occured on my riding partners sp 500 were way out on a trail and had to run it around in the creek to clean off the radiator,this worked too.
It may be worth a shot.
Good luck
Joe

 

I had a similar thing happen on my Mag 500. It turned out that there was some mud on the radiator fins (front and back)A good spraying with the hose took care of it. The mud was hardly noticable so now I clean it out real well after any ride where I have encountered mud. The same thing occured on my riding partners sp 500 were way out on a trail and had to run it around in the creek to clean off the radiator,this worked too.
It may be worth a shot.
Good luck
Joe

 

I had a similar thing happen on my Mag 500. It turned out that there was some mud on the radiator fins (front and back)A good spraying with the hose took care of it. The mud was hardly noticable so now I clean it out real well after any ride where I have encountered mud. The same thing occured on my riding partners sp 500 were way out on a trail and had to run it around in the creek to clean off the radiator,this worked too.
It may be worth a shot.
Good luck
Joe

 

Mabey a faulty thermal switch that turns on the fan late.

 

 

I had a similar thing happen on my Mag 500. It turned out that there was some mud on the radiator fins (front and back)A good spraying with the hose took care of it. The mud was hardly noticable so now I clean it out real well after any ride where I have encountered mud. The same thing occured on my riding partners sp 500 were way out on a trail and had to run it around in the creek to clean off the radiator,this worked too.
It may be worth a shot.
Good luck
Joe

 

I had the same thing happen on my 2000 SP 500. I took it back to dealer, first time the cooling fan wasn't even hooked up from the factory. Next time, it went in and I waited 2 weeks to have them replace the sensor. All was done on warranty so it didn't cost me. If its on warranty, take it back and explain what happened to me. Otherwise, don't burn it out 'cause they do get warm. I must have added near a gallon of mixed coolant before I had it fixed.

 

It happened to me twice before I found the problem. I am not saying this is the same as yours but the symptoms are the same except for the high temp light being ON. (Unless you had turned the ignition off and back on again before noticing the high temp light. Any way the thing you cannot do with the SP is hang ANYTHING on the ignition key because when turning the handle bars the thing hanging on the key hits the gas cap and turns the key about 1/8". This is enough to shut off all accessories but keep the engine running. Part of the accessories is the cooling fan and no matter how fast you go you cannot get enough air through the radiator to keep it cool with out the fan. So if you have anything hanging on the key take it off. Many people on this forum have had the same problem.
Good luck, hope this helps