Dono just happy it's working I've replaced all washers in valve block and pump. Think I hadn't tightened up the bolts for diaphragm and that may not of helped.
Really tightening the bolts is the only thing I did differently on the last rebuild and check over plus using the old o ring for the diaphragm. So Monday I'm booking her in for a n mot so a whole load of other prob lol
