2002 yamaha wr426 coolant coming out from overflow hose

5 replies to this topic
  • Koala426

Posted June 04, 2013 - 11:48 PM


I notice I saw some coolant leaking coming out from a hose.-ImageUploadedByThumper Talk1370418314.658265.jpg
I make a adjustment on the fuel crew.- cuz was back firing a lot!!ImageUploadedByThumper Talk1370418394.287106.jpg
Is this normal?
This is the coolant reservoir.-ImageUploadedByThumper Talk1370418460.588078.jpg
Thank for all the help.-

  • Thommo_400f

Posted June 05, 2013 - 01:03 AM


Losing a bit of coolant is normal. As long as it doesn't dump heaps. Your radiator might be slightly overfilled also.
Fuel screw will help with deceleration popping but not over-rich needle which will be a rough acceleration feeling and backfire.

  • Koala426

Posted June 05, 2013 - 08:00 AM


The coolant coming out from the hose sometime is a couple drops, and some time is like a soup spoon.- depend how mush I ride.- temperature here in California now is +- 76-90may be is that the reason?
Thanks again.-

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  • Thommo_400f

Posted June 05, 2013 - 06:59 PM


You may just need a new radiator cap. If you are getting fluid dumping all the time and the bike isn't boiling, then it's time for a new cap.The old one is just letting too much past.
make sure you don't fill your radiator more than a a tiny bit over the internal core otherwise there isn't enough room for normal operation.

  • Koala426

Posted June 05, 2013 - 08:59 PM


Start when I moved the fuel screw I think.- this bike has a new extra large water pump.-ImageUploadedByThumper Talk1370494720.466656.jpg ImageUploadedByThumper Talk1370494750.338732.jpg

  • GCannon

Posted June 08, 2013 - 07:10 PM


Replace the radiator cap! The radiator cap is the presure regulator of the system,

2000 Ford ranger 3.0L V6 radatior cap at any Auto parts store $8.00 same as $20,00 cap from Yamaha. Buy 2 ther'e Cheap


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