OK, I admit it - I know nothing about engines and cars!!
I would have thought fitting an expansion tank would be simple..... but google is not my friend any more...
Do I need an expansion tank or a header tank? sealed and pressurised or not?
I've found so many contradictory articles I'm lost...
This is my "plumbing" at the moment - radiator connected to "engine" and the overflow linked effectively in the circuit. I have no heater to complicate issues...
http://www.flickr.com/photos/7757983@N07/3924362942/
Where should my expansion tank go? I think in the loop between the "overflows". But expansion tanks seem to have overflows on them that would idicate the system is no longer "pressurised" and sealed - or have I lost the plot ?
Last question - does it matter where it goes vertically in relation to the rest of the system?