Having just rebuilt my S2 engine with all new components and bearing etc etc when running it had low oil pressure, so as I went to drain the oil out it was full of water. Been told by a mechanic friend its either a cracked block or possibly a cracked turbo housing thats allowing water into the sump, has anyone else experienced this, I don't think its the head gasket and the head itself was pressure checked before fitting, Any ides guys?????