Check coolant level (sporadic)

[Bulk]

Hey guys,

My X has 200,000Km's (125,000 Miles) on the clock and for the past month I've had to fill up the coolant level regularly.

I check the level daily but the strange thing is that the level doesn't move and then one day it'll just be empty (with the odd occasion I'll notice a huge pool of coolant on the floor).

Because there is the odd leak onto the floor I'm assuming it is something outside the engine like a hose or the expansion tank.

It only happens every once and a while though which has me a little confused or I'm leaving a pool of coolant at the mall without noticing it...

Anyway I've done a search of the forums and it seems that there are two issues, the coolant tank and the pipe running under the intake manifold, I'd rather go the expansion tank first. Do you think that's what it is?

----- I should add that where I live it never gets anywhere near freezing - minimum 10 celsius or 50 fahrenheit -----