27-02-2022, 12:32 PM
If you think about the geometry of the springs you will realise that the leaves have to slide over one another a very small amount. That plus Ruairidh's comment about grit etc leads to the wear of the imprint of the end of one leaf into the leaf above. Because of the movement I believe the leaves should be lubricated. Indeed when my mother had her Morris serviced in the 50's the garage always sprayed the springs . My old A7 rear springs had the remains of a very thin zinc sheet between each leaf which was perhaps original (1932?). That would have provided some dry lubrication and helped with wear so might be the ideal solution. As we cannot go that way I have greased the front spring leaves then wiped them over and wrapped them with the sticky Denso tape and I hope the grease will keep water away. The back springs were new and assembled so I could not grease them and I immersed them in old engine oil for a few days before wiping and wrapping with the tape. Remember many of the older more prestigious cars have leather gaiters over the springs. No perfect solution really.