deepfrz is right about the antiseize but there is no need to do it if you just immerse them from the beggining to
diesel and proceed with the check for the nozzle that dros smoothly by itself you are ok
if doesn;t drop don't force it ,gently take out the nozzle clean and blow with air the body of the nozzle immerse again and gently move up and down and turn as lapping , few times and check again for smooth drop
always move the nozzle while it has lubricant(diesel)