Hi. I know there are several posts on overheating although it has only happened once to me.
I recently bought a 1995 sporty elxi and when driving home noticed the temp gauge rocket up. I pulled over and noticed the coolant system was empty. The AA were called in case of any underlying probs. He pressure tested the system and found no problems or leaks. Suggested head gasket blown. I have occasionally had to top up with water but nothing major. After the car has been running for a while i can hear a bubbling/hissing noise coming from around the head once the engine is turned off. Have been to two garages and had two different answers.
a. water pump was needing replaced.
b. there is nothing wrong with it!!!