Venting pressure through the radiator?

6 replies to this topic
  • radish150

Posted April 08, 2008 - 01:04 PM


Well, the big blue ox (99 400), after nearly 3 years of "daily driver" use has started to have a bit of strange behavior. Symptoms are, a bunch of water dissapeared very quickly in a very short period of time, when I shut it off I can hear an "oozing" noise of pressure escaping into and then out of the radiator. So, I´m looking at a gasket or seal problem I reckon, question is can someone tell me which one it´s likely to be?


  • William1

Posted April 08, 2008 - 02:17 PM


First guess would be a head gasket.

  • radish150

Posted April 08, 2008 - 04:31 PM


Well, that would be my guess, was wondering if there was any thing else it could be though. The most simple explanation is frequently the right one. thnx.

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  • William1

Posted April 08, 2008 - 04:41 PM


Well, you make no mention of see a leak. You make no mention of seeing any signs of water/coolant in the oil. You hear a "oozing" noise of pressure escaping, either it is coolant moving by convetion or pressure in the barrel, seeping past the headgasket into the coolant.

  • matt4x4

Posted April 09, 2008 - 03:48 AM


You getting moisture out your exhaust? Does it smell like coolant?
If you're not seeing it go into the reservoir (and possibly not back out to the bike due to a pinched hose), and it's not showing up as milk in the oil, then it has to be getting burned up in your cylinder - meaning white smoke out the exhaust - possible moisture on the tip of your silencer and generally crappy performance.

  • Ditchdigger

Posted April 09, 2008 - 04:00 AM


First guess would be a head gasket.

That would also be my guess. Had a GPZ600 some years ago do exactly the same thing, as it would spit the coolant out of radiator overflow when under pressure. I did try a new rad cap thinking that maybe it was faulty.

Unfortunately it was the head gasket in this instance. :thumbsup:

  • wartsnuff

Posted April 09, 2008 - 08:22 AM


+1 to head gasket.


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