Having read a lot on this forum we all have different levels of ability around these cars so i thought i would post this it may help some one and some may say ooh i new that.

 

get a long bolt that screws into the pull nut  screw on a nut  and washer fit it in the loose pull nut using 2 spanners hold the long bolt and turn the nut this should pull up the pull nut tight if the thread is still in tackt

Or replace every stinking one of them with rubber wellnuts in some corrosion resistant metal...

themmm a bitch to get out thats why i tried to fix first 

All mine have been replaced with rivetted on nutplates over the years....I detest the cursed things....