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post #1 of 7 (permalink) Old 01-05-2009, 05:06 PM Thread Starter
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overheating. please help

i have a 2004 polaris 800 rmk. the temp light keeps coming on after about 5 minutes of riding it. when the light is on it bogs at about 4000 rpm. when it cools down it runs fine. i have plenty of coolant, i checked the thermastat and it isnt stuck. im thinking either the water pump is seized or the belt broke. or it is a temp sending unit. any other ideas?
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post #2 of 7 (permalink) Old 01-05-2009, 07:19 PM
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After you rule out the belt and it still overheats, take a look at the water pump. Sometimes the nut that holds the impeller on comes loose, the pump will flow coolant at an idle, but as soon as the engine winds up, the shaft inside the impeller spins, and the impeller doesn't pump. Be careful, if it's the belt, you lose the oil pump too.. you can make it 4.5 miles on those big block Liberty engines before the lack of oil will seize the engine (been there).

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post #3 of 7 (permalink) Old 01-05-2009, 10:05 PM
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Not sure where you live, but if it's a recent problem.....I had the same issue Saturday morning up in Wis, after the freezing rain....mine was due to the ice not letting enough snow up on the coolers above the track....just ran off the trail a little bit to kick up some snow and problem solved.

Just an idea
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post #4 of 7 (permalink) Old 01-06-2009, 06:49 AM
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Quote:
Originally Posted by warp1 View Post
Not sure where you live, but if it's a recent problem.....I had the same issue Saturday morning up in Wis, after the freezing rain....mine was due to the ice not letting enough snow up on the coolers above the track....just ran off the trail a little bit to kick up some snow and problem solved.

Just an idea
sounds like my issue i am having with a 2004 rmk 800 ,the only problem mine is melting the top of my piston on the exhaust side and damaging my cylinders ,this is my 3 rd motor in less than 600 miles ,i am about to give up on this piss of crap motor ,i am still wondering why is doing this ,i have 1 last resort which is my clutch i was told
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post #5 of 7 (permalink) Old 01-06-2009, 11:32 AM Thread Starter
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well i dont think its from lack of snow being thrown up on the heat exchangers because it overheats after about 5 minutes of riding it. i dont think its the motor, i pulled the plugs and they are burning good. i turned it off right when it started bogging and only started it up a couple times after, so hopefully i didnt do any damage to the motor. does anyone know if there is a way to know if the water pump is pumping without pulling it apart.
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post #6 of 7 (permalink) Old 01-09-2009, 03:21 PM Thread Starter
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bump. anyone?
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post #7 of 7 (permalink) Old 01-09-2009, 03:35 PM
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open the cap and see if it the coolant is running through...or you might have a vapour lock in the system, i cant remember if you lift the sled all the way up from the front or rear to get rid of air locks that can be in the coolers
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