Coolant expansion tank....empty

[alexandervf]

Hi,

Every year, i am doing a thorough service on my bike and every time i check my coolant expansion tank.....i always find it empty. I keep refilling to the correct level and i keep finding it empty after a year.

Can someone please shed some light here? as the color or density of the coolant is not altered. Also, when i drain the oil from the bike, it does not look as if it was mixed with coolant.

There are no leaks at all anywhere that would justify the loss....

Thanks

[Dynamohum]

You have a leak somewhere check the rads and all the hoses including connections it can be difficult to locate leaks without the system being pressurised however unless theres obvious signs of a leak wetness you might find crystalisation of dried coolant which leaves a powdery residue at point of leak .
Also its worth checking both the flow and return pipes to the header tank along with the chrome pipe that sits in the v on the top crankcase under the carbs the pipe itself has been known to rot or the o rings and gaskets fail allowing to pool in the v beneath the carbs .
Your nose can also be a good detective locating coolant leaks as it leaves a distinctive sour smell .

[richyrd5]

Hi,considering you live in Greece doing a service once a year in that heat would have evaporated what's in the header tank,,..just keep any eye on it during running about....