overheating update
#1
overheating update
02 sportsman 500. Still having the same issue. Temp light is coming on long before the actual radiator is hot. Fan is not coming on. I have put 12 volts to the fan and it works fine. I burped the system and still can't get the lower hose to feel full and hard. I opened the water pump bleeder and just made a mess of the garage floor. Could this just be the thermostat at this point? Clogged radiator? Is there an aftermarket thermostat that will cross with the stock? OEM is to much to change on a whim. I'm getting really frustrated at this point. Quad fires right up and runs fine. HELP ME PLEASE.
Thank you
Paul P.
Thank you
Paul P.
#2
02 sportsman 500. Still having the same issue. Temp light is coming on long before the actual radiator is hot. Fan is not coming on. I have put 12 volts to the fan and it works fine. I burped the system and still can't get the lower hose to feel full and hard. I opened the water pump bleeder and just made a mess of the garage floor. Could this just be the thermostat at this point? Clogged radiator? Is there an aftermarket thermostat that will cross with the stock? OEM is to much to change on a whim. I'm getting really frustrated at this point. Quad fires right up and runs fine. HELP ME PLEASE.
Thank you
Paul P.
Thank you
Paul P.
#3
#4
#5
Just orderd a new heat sensor that was mounted on bottom of radiator. The wire sheild was burnt and a wire was disconnected. Also notied that the radiator was caked so bad that I had to remove form machine and used water and air presure to clean it up. I tried putting a trouble lite behind it first to see if I could see light, no way it was packed.
#7
Just orderd a new heat sensor that was mounted on bottom of radiator. The wire sheild was burnt and a wire was disconnected. Also notied that the radiator was caked so bad that I had to remove form machine and used water and air presure to clean it up. I tried putting a trouble lite behind it first to see if I could see light, no way it was packed.
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#8
one more time, I replaced the fan switch. Still no fan. Here is what I discovered. I drained coolant through the sensor hole. replaced sensor and cleaned terminals and used electrical grease. Filled radiator with water as I figured if system was working properly I would see green soon enough. Fired up quad with pull rope as battery was weak. Started first pull no white smoke at all. All was going fine, small air bubbles and then the radiator started to get warm and then I could see the antifeeze mixing in. Then as it got hotter it started bubbling hard and burping out as fast as I could re-fill. Fan never came on, but I was adding cool water to the radiator. Finally gave up as I was running out of water. End of the story is i'm thinking the thermostat is openeing and when it does it is leaking from the head gasket and blowing back into the cooling system. Does this sound about right? any other possible solutions? Maybe? If not does anyone have the procedure with torque specs? I'm no stranger to the garage, raced MX for 20+ years and turned my own wrenches every weekend. Bikes are open and easy to get at. Not these big heavy boxy things. I'll learn could just use some guidance. OPT, Thank you for all your support so far. Wish I could buy you a beer or 2 and everyone else who helped
Thank you
Thank you
#9
one more time, I replaced the fan switch. Still no fan. Here is what I discovered. I drained coolant through the sensor hole. replaced sensor and cleaned terminals and used electrical grease. Filled radiator with water as I figured if system was working properly I would see green soon enough. Fired up quad with pull rope as battery was weak. Started first pull no white smoke at all. All was going fine, small air bubbles and then the radiator started to get warm and then I could see the antifeeze mixing in. Then as it got hotter it started bubbling hard and burping out as fast as I could re-fill. Fan never came on, but I was adding cool water to the radiator. Finally gave up as I was running out of water. End of the story is i'm thinking the thermostat is openeing and when it does it is leaking from the head gasket and blowing back into the cooling system. Does this sound about right? any other possible solutions? Maybe? If not does anyone have the procedure with torque specs? I'm no stranger to the garage, raced MX for 20+ years and turned my own wrenches every weekend. Bikes are open and easy to get at. Not these big heavy boxy things. I'll learn could just use some guidance. OPT, Thank you for all your support so far. Wish I could buy you a beer or 2 and everyone else who helped
Thank you
Thank you
#10
I checked the thermostat lasnight and all was fine there. Started it up and NO white smoke, NO contamination in the engine oil. Going to check the waterpump next. I did ask at the dealership and they stated that they would be surprised in it is a head gasket as the have only sold 2 of them in 6 years. They did the water pump seal and wondering if they may have not tightened the inpeller. I have no problem with replacing the head gasket, but would hate to go that far if not needed. The lower hose still doesn't feel full. When I replaced the thermo sensor at the bottom of the radiator it flowed out without problem. Is it possible there is a blockage in the rad? Engine hot rad cool.