You need to adjust the treaded part on the bonnet that the spring surrounds,this is the part that sits into the catch on the slam panal,it has a mushroom shaped head .You will see it has a big lock nut at the top,loosen this nut,at the mushroom shaped end theres a slot to put a screw driver in,turn the whole lot 2 complete turns clockwise,shut bonnet and see is the bonnet still loose.If it is turn it another 2 complete turns and so on until the bonnet no longer moves.Then tighten up the lock nut and job finished.Regards Micky