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post #1 of 10 (permalink) Old 05-14-2019, 05:31 PM Thread Starter
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Over heating

Thanks in advance. I’ve read countless threads and still can not figure out the problem. It’s a 2005 Rincon 650 (black). I’ve owned it for 4yrs now. It started to over heat so I removed radiator and flushed as well as cleaning between RAD and Oil cooler (broke seized bolt) and installed a new oil cooler. Still over heating so I changed the radiator cap and still over heating. I just replaced the thermostat and it rode longer before it started over heating again. Previous owner wired the fan directly to ignition and it is coming on. Only thing left that I can think of is the water pump. It does not leak neither coolant nor oil. I’m stumped😖
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post #2 of 10 (permalink) Old 05-15-2019, 08:00 AM
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By chance is the red light coming on after 5 minutes? Or is rad fluid actually boiling?

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post #3 of 10 (permalink) Old 05-21-2019, 07:03 AM Thread Starter
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The red light comes on after a few minutes of riding and you can smell the coolant as soon as it starts to get hot. Have not tried taking the radiator cap off when hot (just cause I don’t want to wear hot coolant&#x1f92a
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post #4 of 10 (permalink) Old 05-21-2019, 09:00 AM
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Was the coolant changed in the 4 years you owned it?
If the radiator is not plugged up and all other cooling components are good I say water pump.


Oil it, lube it, fix it.
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post #5 of 10 (permalink) Old 05-21-2019, 10:08 PM Thread Starter
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No, it had not been changed. When I installed new oil cooler I removed radiator and flushed with clean water and there was no clogs. At that time I put new coolant and still having the issue. All I can think of that is left to replace is the water pump.
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post #6 of 10 (permalink) Old 05-22-2019, 08:30 PM
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Well it would be easy to pull the water pump to check it. The way it is designed, I couldn’t imagine it would be damaged bad enough to stop the impeller from spinning, without you knowing about it.

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post #7 of 10 (permalink) Old 05-22-2019, 10:43 PM Thread Starter
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I guess the only choice is to pull it. Read somewhere it’s essier if you could lift the front end high enough so you don’t lose oil??? Maybe I should at least order gasket or o-ring or whatever I need in case it’s not that?
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post #8 of 10 (permalink) Old 05-28-2019, 08:23 PM
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Stupid question but I have to ask, is the fan coming on and running?

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post #9 of 10 (permalink) Old 05-29-2019, 07:22 PM
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Yeah I’d imagine you could lift the front end to keep from dumping oil. Here’s a video I did on replacing the seals, if that is helpful.

https://youtu.be/0LSrW1LwEfQ

680 Camo Rincon, Warn XT30, ATV Guru bumper, Mad Dog bag.

500 Foreman, Warn 2.5.

Rides in 30' Patio Hauler 5th wheel. Towed by 3500 SRW Ram.
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post #10 of 10 (permalink) Old 05-29-2019, 07:34 PM
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I was also wondering if the machine is boiling coolant? I think you can also get an overheat light for oil temperature, and things like a slipping transmission could cause high oil temperature.

Also, what have you got for coolant? Most motorcycle coolant comes premixed 50/50, where many automotive coolants should be mixed 50/50 with distilled water. Ethylene glycol doesn’t carry heat as well as water (but prevents freezing, raises boiling point, and reduces corrosion). Mixing stronger than 50/50 can cause overheating.

680 Camo Rincon, Warn XT30, ATV Guru bumper, Mad Dog bag.

500 Foreman, Warn 2.5.

Rides in 30' Patio Hauler 5th wheel. Towed by 3500 SRW Ram.
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