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Posted by: pads
What year is it? Does it have the louvered side panels? Is the fan working? Is the light coming on or is it just running hot? More info needed.
Posted by: pads
Let the machine cool, pop the radiator cap off and leave it off and start the machine. After it warms up you should start to see the coolant flowing if the thermostat and the water pump are going. If there is no flow, start with replacing the thermostat (that is probably more likely than the water pump). Also, check with your local dealer and see if there were any problems with that year of Grizz.
Posted by: Rackman
yes check the rad , the corners fill up with mud and you can't see it.
Posted by: hondabuster
How do you know its overheating?
First thing is check the coolant level. Next check to be sure the radiator isnt plugged up with dirt or mud, which is a common reason for overheating.
Posted by: Curls
700r,
Your Grizz is probably not actually overheating. You most likely have a bad #1 thermal switch. It's located by your water pump and will cost about $30.00 and about 20 minutes to replace it. My 04 Grizz had the same problem. I changed out the faullty sending unit (thermal switch as Yamaha calls it) no more temp light.
Good luck
Posted by: Curls
If you're boiling over forget what I just said about the #1 thermal switch and go with the total radiator scrub routine. Make sure your not jetted too lean or running bad gas. Also make sure your cooling fan is coming on. Thats controlled by thermal switch #2, and look at your thermostate to see if it's sticking. Make sure your coolant is a 50/50 mix and not straight antifreez.
Posted by: batmanacw
More info!
Posted by: Gipper98
be sure both sides of the radiator are clean!
Posted by: 700r
my dads grizzly runs too hot and overheats when it shouldn't. what is the problem
Posted by: 700r
it is an 02 model with the 04 vented side panels, coolent level is fine radiator is presurewashed clean. the temp lite comes on when driving under normal riding conditions, not meaning fast or hard on the gas
Posted by: 700r
the coolent boils in the radidador and leaks boiling coolent out the resivoir
Posted by: 700r
thank you the radidador is clean and the fan is on all the time.
Posted by: 700r
i did that and the coolent does move slowly after warmed up. all grizzlys are known to run hot but not over heat, that is what i heard
