FTO AUSTRALIA

The coolant keeps disappearing after every time i fill it up, for instance i filled up the bottle 3 hours ago drove the car for 5 minutes afterwards then i went and checked it just then and the bottle is completely empty. i checked the radiator cap and there's nothing in there. I've already replaced the hoses in case one was leaking, I've also checked under the car and there's no marks of leakage on the concrete.

Any help would be appreciated

Maybe change your engine oil and check for water then?

Don't fill it at the bottle. Should be filled from the cap. if no leaks are seen then highly likely you have a head gasket leak. What colour is the oil under the radiator cap?? If it a light brown colour??

Yup ^ check your oil. If its brown & sludgy, you got a problem.

Also check your exhaust, get someone to look at it while you give it a rev, I've seen head gaskets go between water galleries & the chamber which see water piss out the exhaust when you rev it.

I'm ordering the complete gasket set from Camskill is there anything else i should have done to my engine at the same time since it's going to be in pieces?

What if the bottle indicates low on coolant but from the cap the coolant is still up to the spouts.
Should i fill up the bottle?

Yes but only to the line. Its an overflow tank.