With mine cool, rad full, running & give it gas. the coolant drops which kinda tells me is pumping. & when let off it comes back up.

 

Well....it's got a hole in it, so it leaks! LOL! Couldn't resist....had to add a little humor....carry on!

 

True why is is there a hole in the top of it lol

 

If the hole was in the bottom it would leak all the time DUH!!!

It is like a pressure release, when there is too much coolant in bottle it spews. When the engine cools the fluid in bottle is pulled back into engine, if there is any.

 

LOL I know I was joking that the leak was coming from a hole

 

I knew you were jokin, as was hog, as was I.

So did you get to the cause of why it is blowing out the top yet?

 

Ah sorry I knew hog was some reason I didnt think you were joking lol

Ok heres the deal tell me if its possible. My battery went bad and I replaced it today. I have not had it leak once since I replaced the battery. and I drove it for 2 hrs not a drip

makes no sense to me . Can you shed any light on this ?

 

HMMMM since the battery was going it may not have been taking a charge properly, most of the current was being expended in the battery and not providing enough umph to spin the fan fast enough to cool it. Just a theory. I would anyway check all these other things also especially cleaning the rad.

The plastic bottle is called the recovery bottle. As the operating temp increases excess fluid is forced out of engine past pressure cap into bottle. When engine gets too hot (to include not being cooled enough in the rad) the coolant just keeps expanding into bottle filling it up until fluid blows out hole in top. While it was filling bottle air was coming out hole but you don't notice until the fluid spews.

Hit a cement mud hole couple weeks ago that filled my rad fins so that fan could not draw any air through. Took the screen off and was just a solid sheet of dried on silty mud. That ws reason behind me disassembling & cleaning well.

 

ok thanks for details ! I will take a look at that also

 

so did anyone mention where that vent line is.. i dont think i have ever noticed or even looked for it... my cousin has a 00 sp 500 that is having over heating issues also.. think it might be the thermo but not sure