loosing antifreeze without leeking crf 450

[cr lover]

i was riding my bike, 2004 crf 450 and stopped my bike and could hear bubbling noises coming from my radiator. opened up my radiator cap to find no site of antifreeze.then when i took my bike home i then also noticed my case breather tube was full of oil. i had just checked it before my ride for the day. i drained my case tube. then added antifreeze and went for another ride the next day.after about an hour stopped my bike and again my antifreeze was gone.
i checked the motor oil and found no antifreeze in there.this time my case breather had the normal amount of oil in it, not full like last time. what do i do now.is my water pump seal bad? which i no are common problems for crfs.what steps do i take now. please help.

 

[oldfrt613]

If the water is not leaking out, and it's not in the tranny or engine oil, then it's going out the exhaust. I would start and let it idle on concrete. It should quickly heat up and let you find any external leaks ( thumpers will overheat without air passing over radiator. If it's not boiling out ( like out the overflow because of week cap ) or somewhere else, the next logical place is in the engine or tranny oil. If that looks good, it's probably the head. The blow by on the breather would lead me to suspect cylinder pressure is leaking into the case.

 

[cr lover]

i have not checked the tranny oil. if the seal is bad would it go into the motor oil or the tranny oil. my guess would be tranny oil.

 

[cr lover]

the tranny oil and motor oil is ok. now what.do i have to replace my head?could it be a bad gasket.please help.i have a race on friday.

 

[KDX CRAZY]

Have the head checked to see if not warped or cracked .
Could have blown head gasket .

 

[Zoomer]

I go along with the head gasket blowen, or stuck radiator cap maybe.

 

[cr lover]

thanx alot for the help.if anyone else has input feel free to reply.

 

[cr lover]

hey just pulled off my header pipe and found out that the inside of my pipe is all white.looks like its time to tear it down,or is that normal

 

[Try Me]

head gasket time