The problem with the old washer is that it has become 'work hardened'. So, it needs to be re-annealed.I've always re-used the old ones. On my Porsches and S3 Landy...just sand 'em flat
Just heat the washer with a gas flame until it begins to glow then drop it in water. Job done. 5 mins including finding the gas torch (one borrowed from the kitchen works very well!
