[btlesher]

Hey y'all, having an overheating issue on my 2007 m50 following a punctured radiator (gravel road).

So far i've replaced the radiator, thermostat, and fan sensor at the bottom of the radiator. I know the fan works as it still turns on if I short the sensor, or after it's been running at idle for a while (last run was about 30 minutes). After about 30 mins at idle, the temp sensor on instrument panel kicks on saying it's hot again. I'm not sure where to go next. my gut is water pump, but i'm hoping someone can give some better guidance for this.

Thanks folks.

 

[Easy Rider]

Not very likely that any other parts actually failed at the same time that the radiator leaked.
So my guess is that the cooling loop has a BIG air bubble in it and thus is short of liquid.

 

[btlesher]

I hadn't thought of that, so thanks for the idea. I also didn't like the multiple part failure. Do you know a good way/guide for clearing the bubbles out or testing that?

 

[Aussie Steve]

You need to 'burp the cooling system. Remove the radiator cap and with the engine running tilt the bike from side to side as far over as you can without dropping it. This should get rid of any air trapped.


Good luck

 

[Easy Rider]

You need to 'burp the cooling system.

AND......I would hope that after it warms up, you could see some movement of the coolant with the cap off.

 

[Oldguy79]

After you have rocked bike while running,the thermostat operates at 165 degrees F-195 degrees F, at 195 tstat should be wide open,and you feel discharge preassure by water pump, will tell you if Tstat is open, as said before probably not multi failure of components. Info came out of Cylmers M50 manual 20001-2009