Took a punt on a cheap (too cheap) red 2002 316ti last week. Drove fine, really well actually. Tiny wheels but have a spare set of MV2s to put on, would make a nice little run around for the Mrs.

Engine-wise, 1.8 M42B18 I think. No gunk under oil filler cap, no gunk on dipstick. Rookie error, never checked in the coolant. Got home, coolant light. Opened rad cap to find lots of creamy gunk. Strangely enough, plenty of water in engine.

Car has sat for a time, has an indicated 86k miles (no history tho) Didn't overheat, drove it 20 miles home with no issue other than the heater not getting warm. Planning to flush the rad over the weekend and hope for the best. Grasping at straws, I fear a HG.

Any advice/tips?