Hey guys I have a 2000 sp 500, when ridding this weekend my temp light came on, first thing I thought of was to wash the rad, after I cleaned it I drove more, the temp light came on again, so I turned the bike off and coolant was blowing out the cap on the overflow bottle. so I started it and the fan started, then the level started to go down in the bottle, but when the fan stopped the level started to go up again and then started blowing out the bottle cap again. I am hoping it is the rad cap or the t stat. Thanks for Any help. Darren

 

NO BODY has had this problem???

 

Is the fan cycling on and off as normal or does it seem to go on later than normal. I don't think it is the rad cap or the stat. It just might be the fan sensor on the rad. Is you fan sensor on the top of the rad or is it like the new ones on the bottom. If it is on the top you just don't have enought antifreeze in there.

 

Most of the time your radiator is not as clean as you think it is. Take the radiator out of the machine and you will see what I am saying. You just can't get them clean in the machine.

 

The fan sensor is on the bottom of the rad. I tested it and it is working, I put a new rad cap on and it was not the problem, so last night I pulled out the rad and cleaned it real good, so I am going to try it today, thanks

 

Thermostat mabey

 

a bubble can cause this problem in the system. I've always had similar problems when filling the cooling system after a flush/change. The best way to get rid of the air bubble is to leave the radiator cap off, start the machine (cold) and wait for it to warm. Then rock the machine forward & backward 1-3 inches while looking down into the radiator after it gets warm (WEAR SAFETY GLASSES INCASE IT BURPS). You will see the radiator fluid level drop when the thermostat opens (~135*F) and that's when you start rocking it-- slowly pour 3-6 oz into the radiator as the level drops. Continue this until the level does not drop from the rocking motion. Fill the coolant reservoir to the max level after this. Now put the radiator cap on & test drive it.

if it gets hot again (and the fan is running), then let the engine cool & repeat.
Sometimes it is quicker to put ramps on the back of your pickup and drive the machine about haflway up the ramps-- this will aid the "burping" process.

Try not to spill too much coolant unless you have a catchpan below & dispose of it properly.

let me know if this doesn't help and we'll try to determine what else is causing the problem.

 

Hey guys I pulled out the rad it was pretty dirty, so I cleaned it real good, put it back together and put 40 miles on it the passed weekend, ran great. Fan was starting and stopping, no overheating. If it acts up again I will take your advise duffus. Thanks for the help boys. Darren

 

another trick when burping the system. When it gets warm squeeze the bottom radiator hose slowly and then let it go quickly. Don't squeeze it to fast or you could push antifreeze out the top of the radiator. This will help to get the bubbles too.

 

you can clean your radiator with out taking it out by taking the front end off the machine..4 bolts and take the brush gaurd off if you have one on it......I too had the same problem washed it out tried to make it home didnt do a good job the light came on..got home took the front end off washed it out no problems since..