So finally had the Ute go in for a service and a coolant flush after noticing the overflow bottle was almost empty, and some staining on the driveway. Not surprised to find out I need a new radiator. Bloke (who is my dads mate who owns the shop) reckons the ignition barrel is cooked as well, and you could the start the car with any key, haha. He reckons that’s what could be causing the hot start issue, but I’m not convinced, still reckon it’s the heat from the extractors getting to starter motor. Wait and see I guess. So it’ll be over a grand for all of it, that’s including all the drive belts and hoses which were really worn. Expected it to be needing a bit of work for how old it is, and good to know it’s slowly getting stuff fixed as I go.