boiling antifreeze

12 replies to this topic

Posted March 25, 2005 - 08:49 AM


after about ten minutes of riding i here a hissing noise from my radiator and the plastic tank under the rear fender is boiling. when the bike is cool the radiator and plastic tank appear o.k. . :) any thoughts?

  • simon@vic

Posted March 25, 2005 - 11:44 AM


it happens to me from time to time. but it takes more then 10 min and it only happens on when I'm riding the most insane of single track.

  • WRookie

Posted March 25, 2005 - 04:05 PM


Old coolant?

Radiator fins crushed closed or plugged? Airflow ok?

Is it boiling or is it possible that you have a leaking cylinder and gases are being pushed into the tank?

  • gregwr450f

Posted March 26, 2005 - 12:18 AM


I think it was Frostbite who did some investigation into "heating" of the Wr
Pm him for the details, I think by putting "heat-tape" on the the bottom section of the radiator (not over the finned area) it helped it run 350 degrees cooler.
I hope it wasn't a dream.

  • Tomppa68

Posted March 26, 2005 - 01:44 AM


Take a look at:


Posted March 26, 2005 - 04:57 PM


thanks i got some good info

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Posted March 26, 2005 - 04:58 PM


thanks for the info

  • PumpkinHumper

Posted March 26, 2005 - 08:00 PM


If its boiling over in 10 minutes there is isues. I wonder if the radiator cap isn't holding pressure.

  • gregwr450f

Posted March 26, 2005 - 08:51 PM


You could be right YZ.

  • TallBoysWRF

Posted March 26, 2005 - 09:20 PM


Is it a 50/50 mix of antifreeze to water? If you have too much water/too little antifreeze, you will have a significantly lower boiling point.

  • Supafreak_711

Posted March 27, 2005 - 05:40 PM


Maybe try some engine ice?

  • gregwr450f

Posted March 27, 2005 - 11:00 PM


Wrong, see the post by "Newblue"


Posted March 28, 2005 - 06:13 PM


Thanks Again I'll Keep An Eye On It


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