I have a '95 525i with a blown head gasket...turns out my head is cracked. I found another head which all looks good, i.e. valve seats good, no cracks, etc. The only question is that the machinist stated it needs to be milled 6 thousands to make it level..but states that it's already been milled and will be below specs if it's milled again...he states that could be a risk.
The mechanic who sold me the head showed me two holes on the surface which he states is to detect when the head has been milled to it's limit. There's plenty of room according to the depth of the holes.
Can anyone tell me is these holes are for that purpose?