im about to buy a GSR from my teacher for 5k, has like 140k on it. what are all the things that i should check under the hood before buying? he told me that theres juss a few minor problems just an oil leak and there's this liqid leaking inside the car on the clutch, "but everthing else is in perfect condition" that what he said. but anyways what should i check under the hood?. what do you guys think?