wr400 water going to expantion tank?

5 replies to this topic
  • higgy456

Posted June 12, 2010 - 11:36 AM


Can anyone help me please , i have just rebuild my bike after detonation and its running ok except it keeps overheating , when i put water in the radiator the pressure builds and pushes the water to the expantion tank, please note that i have just tried to reseat the valves so i was kind of thinking it was down to the shims being the wrong sizes what do you guys think?:thumbsup:

  • William1

Posted June 12, 2010 - 01:42 PM


If, with a full radiator, radiator cap off, engine running, you dsee bubbles, you have a bad head gasket/waped head/poorly fitted oring. If it looks good, it could well be just a bad radiator cap.

  • higgy456

Posted June 12, 2010 - 02:03 PM


so if i see bubbles coming up then there is a prob with the gasket/o rings or warped head?

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  • William1

Posted June 13, 2010 - 03:01 AM


Yes, that is correct

  • tt3506spd

Posted June 13, 2010 - 03:18 AM


And that means a lot of $$$$$ down the drain.....

  • eu001939

Posted June 13, 2010 - 10:04 AM


Is the water pump working and are all the hoses connected correctly ?


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