Hi Silvers:
I must disagree with Chuck on this question.
There used to be a place called Standen Spring on McLeod Trail in Calgary that specialised in the re tempering springs for autos. It was done as an inexpensive way to get springs working again after they lost their tension. My buddy had to do it to his 70 240Z. It was an inexpensive way to get working springs for rare classic cars.
I remember doing this in a Hot Metals class that I took as an undergraduate. I think that the spring was brought up to a certain temperature and quenched when a certain colour was achieved. If done correctly, the spring was returned to its original state.
Of course,YMMV!
Try tempering the spring again with help from a heat treating company that specialises in this type of work.
Good luck,
Franchi
