I just bough an old (1980s) Nissan Pathfinder.
In the engine I have managed to identify the engine-oil hole, the radiator-water hole and the windshield-washer hole (you can tell I'm a car expert!) which are generally all I need to understand.
But there is a metal tank at the top of the engine about the size of a coke can with an oil type filler cap. In it is a pinkish liquid that looks a lot like hydraulic fluid.
What is this for?, what do I put in it?, and how bad is it if I don't!