well I now know why I have a miss fire for a few seconds on start up after she has stood for the night. Got a slight leak on the head on number one cylinder. Plus a little leak coming from just above temperature sender unit on head seam. So off it will come this week off for a pressure test and crack test and if ok skimmed. They are going to check valves and guides while they have the head for me. So I’m going to be a busy bee next week. Already got head gasket set along with new head bolts so fingers crossed it’s not got a crack in it.