[pauldavies]

The mystery of the two gaskets, having finished cleaning up the head and no4 bore I am in the process of re-assembly, when the head was tightened down I looked to put the two bolts in the water pump at the front/top of the head. They don't line up due to the holes in the cylinder head where the thread is are lower than the clearance holes in the water pump and that's why they put two gaskets on to raise the head up. Silly me. I have taken the water pump off and will elongate the holes in the pump. Yes it is quite likely the head has been machined to cause this, no knocking when engine is turned over so ok..