600 overheating - Polaris ATV Forum
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post #1 of 6 (permalink) Old 08-17-2019, 06:36 PM Thread Starter
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600 overheating

My friend's 2004 1/2 600 sportsman overheated on our first ride with my new machines! It was working fine, then at the stop, it started boiling the coolant.

We never heard the fan turn on. It was full of coolant, and after it cooled, the engine oil seemed fine (no mixing of coolant and oil).

It looks like their is a sensor in the radiator at the bottom right that connects to something on top (they have a rack, can't remove the top hood part).

Do those go bad? Could we jump the sensor and run the fan full time?

Thanks!
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post #2 of 6 (permalink) Old 08-17-2019, 06:57 PM
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If you pull the connector off the sensor on the head the fan is supposed to "run wild", meaning continuously. That one quick way to determine if the sensor is bad or the fan.

2011 Sportsman® 800 EFI
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post #3 of 6 (permalink) Old 08-17-2019, 07:37 PM
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Quote:
Originally Posted by bp405 View Post
If you pull the connector off the sensor on the head the fan is supposed to "run wild", meaning continuously. That one quick way to determine if the sensor is bad or the fan.
I don't think the fan defaults to ON with the early models like the OP has. That feature wasn't added till later year models if I'm not mistaken. You can unplug the connector to the fan switch in the radiator and jump it to make the fan run continuously though.
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post #4 of 6 (permalink) Old 08-17-2019, 07:40 PM
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My bad polman is more then likely correct!!!

2011 Sportsman® 800 EFI
GURU front brush guard
GURU rear brush guard
Polaris front lock n ride cargo box
Polaris rear rack extender
Warn RT 3.0 winch w/amsteel synthetic line
Viper aluminum haus fairlead
Polaris front spring adjusters
Ricochet a-arm guards
Ricochet full frame skid plate
ITP T-7 beadlock 14" w/OMF inner rim guards
Maxxis big horn 2.0 26x9 front
Maxxis big horn 2.0 26x11 rear
QSC clutch kit
EPI HD springs front n rear
ODI rogue 130mm grips
Ultraseal commercial grade tire sealant (front)
Highlifter tire sealant (rear)
CTEK 3300 battery maintainer
added 7 zerks
beefed up wiring harness
OGIO rear bag
ROTOPAX 1gal. + 2gal. gasoline can
Jccapri bushing kit
Kolpin Over Fenders
Rigid Industries E-Series 10" flood
Walker Evans struts
NGK Iridium's (2,500 miles on Champion's and they looked great!)
Odyssey Extreme battery PC545

2018 Sportsman® 570-T
2019 Aluma® A8818
2020 Outlander® 1000R XXC (on order, ETA mid-Sept)
bp405 is online now  
post #5 of 6 (permalink) Old 08-19-2019, 09:06 AM
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Two thoughts.

1. Mine was doing that, and I had a bad radiator cap of all things. It would boil over.
2. I noticed this weekend my fan was running all the time, and when I shut it off, I could hear coolant boiling, and it turned out that I had so much crap in the radiator that got past the screen in front of it, that I had to pull the radiator out, and get a pressure washer to clear it all.

I do a lot of "running over stuff" with mine to make trails when I am at the hunting club, which I am sure contributed to all the debris packed into the fins.
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post #6 of 6 (permalink) Old 08-19-2019, 03:56 PM Thread Starter
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Thanks everyone! My buddy is going to start with the switch.
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