Hi guys I have a problem with high oil pressure 60psi on tick over and it goes off the gauge when you rev it up I have renewed the oil pump which houses the relief valve the oil filter (genuine}.The guys that do my engine work suggested a blown head ,I have removed it and everything looks ok it only needed 4 thou taking off it .The pressure is that high it makes the oil aerated and milky colored .I knocked the test gauge off by accident the pressure nearly took my head off .I am a bit reluctant to put the head back on until I can find something any suggestions much appreciated john