Hi all, been a while since i've been on here after getting rid of my Audi some time ago. But i'm back in the market for a TT.... I've just looked at a W-reg 225 with 81k, up for £8700. Everything seems fine with it (had cam-belt done etc and full service history), except for one thing. I checked the oil cap and there was a bit of yellow gunk there, not a lot but i did notice it. I have 0 mechanical knowledge, but i assume thats something to do with the head-gasket. Is this a easy problem to sort? or does it mean a lasting problem and a purchase i should steer clear of? Many thanks.