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overheating? coolant spraying out

13K views 16 replies 7 participants last post by  amduscias  
#1 ·
ok so on my 05 636, track riding.

my coolant overflow is leaking uncontrollably. when im riding on the track time after time my feet slip on the pegs because my boot is covered in watter wetter.

when i get off the track my bike is all the way up in the high 240's. when i come to a complete stop the overflow hose violently spews out coolant and steam. which leads me to beleive it is boiling somewhere in there? i flushed my radiator and changed out the coolant the first time this happened but this last track day i thought! that i had fixed the problem, but nope, same thing happened.

i have been searching all over the place to see what this problem is, havn't really found anything exactly the same to my situation as most people "overheat" in the 220's or 230's couple people get as hot as i do but i havn't found a definitive answer.

what i have narrowed it down to, or what other people have suggested is:
-new radiator cap
- new overflow reservoir cap o-ring
- check thermostat
- flush to get out air bubbles
- head gasket?
- hoses reversed to reservoir
- new radiator
-water pump

everything seems to check out, i will double check. anybody have any suggestions? anyone else experience your foot falling off your pegs while leaned all the way over and almost fall off the bike at 90+ mph? also im pissed that my freshly painted plastics (and boots) are all covered in watter wetter...

thanks for any help/ advide
 
Discussion starter · #4 ·
yeah, i think i'll order a new thermostat just to be safe and see if it fixes it when i get the money.

and yeah the cap is on correctly, i've put it on more than once and still have the problem so i know its not going on wrong every time, plus i wasn't the only person to put it on
 
Discussion starter · #7 ·
yeah, thats me diving for my quarter ahahah.

theres around 8k on the bike off the top of my head

after that crash, my lower radiator hose came off and i was leaking water wetter on the track (caused a red flag..sorry guys) and so when i got back my bike was hot, i checked all the hoses then and they checked out. no holes or pinches?

whats this about "fractured impeller"?