I used to have a Triumph Stag so I developed a squint, one eye looking ahead, the other constantly glued to the temperature gauge. It has left me with an overheating phobia, I can smell anti freeze in a hot engine with a tiny leak.
I use a pressure system to check for leaks, very useful, similar to
http://www.ebay.co.uk/itm/UK-Univers...YAAOSwcu5UMWMa