Interesting day yesterday which I thought I would share. My 240z is pretty original aside from an L28 engine swap by the previous owner. The big issue here is the fact that it has been in storage for many years before I aquired it and my lack of understanding to the ravages of time. My car has only recently been road legal and thankfully I have only undertaken short trips, mainly to listen and get used to all the sounds the car makes. The initial runs showed the temperature and fuel gauge not to be working. From advice I earthed the sensor lead out and gauge worked showing what I thought was a sensor problem...wrong assumption!! I felt the car was running hot and I had to top up the radiator which was very strange as I couldn't see a leak. A short trip and the gauge was showing a reading, stopped to check and found the first problem, as per attached. Split pipe draining the water under pressure. Keep in mind the idea of pipework / old car. Next issue was the fuel gauge. Advice was pointing towards the sender unit. Think I've found the problem as per attached!!!!! While removing the fuel tank I've been amazed at the appalling condition of the original pipework. It was either as hard as a bullet or jellified nearer the tank. I can only stress that although my car is very solid and rust free this will not apply to the pipework. My naivety and lack of classic car knowledge might have caused the loss of my car to a fire or perhaps mechanical damage to the engine. I am now changing all the rubber fuel pipes, clearing the crud out of the tank (looked great externally), replacing all water pipes and considering the wiring. I was carrying a fire extinguisher so I did think ahead a bit!! Hopefully the above and attached will act as some guidance.