If of interest to anybody, After my water version leak down test ...valves out of 3and 4 cylinders just to take a look,,, inlet look almost spotless, exhaust looking pretty crappy on the valve face. , But no obvious lapped or ground angel on exhaust valves, this was a new cylinder head that was fitted by bmw, at about 70 k, I’m really not sure if when they supply a new head, it comes completely assembled, Or they assembly in workshop with original valves etc ,,but no obvious sign that they ever got lapped in on rebuild,
Or even did a proper job on shimming, as they were almost all, way out from memory, It did run ok ish , but could have been a lot better if done properly imo, but fair play to the lads ,am sure they don’t get much time to spend on this type of head rebuild,,... my local Nissan dealers outsource head rebuilds shame on them,, , But lad being what he is, went and bought a new brand new motor from bmw,,leaving this one to play with...
few pictures. Inlet porting looks ace...