What operating temp should a 1982 Toyota hiace run at?

A 1982 Toyota Hiace should ideally run at a temperature between 80-90°C (176-194°F). This is a typical operating range for older vehicles, but always refer to your owner's manual for the precise specification if you have one. If the temperature gauge is consistently outside this range, especially if it's overheating, investigate the problem immediately to avoid engine damage.