Maintenance & Technical > KX500 Original

coolant question

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jpinhb:
If there is an airpocket in the system will it boil out the coolant ?
I went riding this past weekend and after riding a few minutes I stopped and I could hear the coolant boiling , I took it back to the truck and added some coolant and rode a few more minutes and it did the same thing . But I was never able to get all of the air out of the system .
I just looked at it tonight and it's low again . There are no hint's of water in the crank case either .

KXcam22:
I'm not 100% sure, but I think you are correct.  It is the pressure in the system that raises the boiling point. The higher the pressure the higher the boiling point. If there is air in the system the pressure can't increase as much due to the air compressing. Shouldn't be too hard to get all the air out. I tip my bike over when I fill and run it with the cap off for awhile. Also don't forget that little bleed screw on the cylinder head. Hope this helps. Cam.

jpinhb:
Thanks  cam ,
I'll look at it again tomorrow . I hope the problem is just that it wasn't full to begin with and the air pocket boiled the water . I'll keep ya posted .

alan:
You need to make a pressure check! Yhe cap could be bad, I would check it first or just replace! NO or Low Pressure It will Boil! :x

doordie:
Just a tips after you have fixed your cap and a pressuretest,you can use "Engine Ice" it?s a good coolant which is lowering engine temp 5-10 degrees and makes a litle bit of power too. :wink:

//doordie

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