2004 WR450 Coolant issue
Posted January 03, 2009 - 12:30 AM
I've got a 04 Wr450 and after riding it the coolant heats up (obviously) and flows into the overflow tank, my problem is that it never flows back into the radiator, even after overnight cooling. I have changed the radiator cap and the line is clear, does anyone have any ideas whats wrong?
Posted January 03, 2009 - 12:39 AM
Make sure that there are no vacuum leaks in the line that runs between the radiator and the catch tank (especially at the connection to the radiator), and then have the cooling system pressure checked.
Posted January 03, 2009 - 01:06 AM
Posted January 03, 2009 - 09:52 AM
i thought about the head gasket but there are no visible leaks anywhere and with the rad cap off there are no bubbles forming in the radiator, but i'll have to pressure check it.
Mine was the same way. The leak was a small one between the water jacket and cylinder at the rear of the head where the stud comes thru the boss on the barrel. No bubbles in the coolant (which I found odd), no water in the oil or oil in the water either, which wasn't so odd as it was a small leak into the combustion chamber on a fairly fresh engine rebuild.
My bike just started displaying the same symptoms again yesterday on a 100 mile desert loop. I'm wondering if the combination of big bore and hi-compression is a bit much for the gasket...
Posted January 03, 2009 - 04:28 PM
Posted January 03, 2009 - 08:00 PM