I have finished taking my fuel distributor apart and cleaned it and replaced the o rings and it leaked so took apart and used indian head sealer put back together with new bolts and fixed the leak but it squealed so I knew I needed new injectors anyway so I got the new ones in today and it still is squealing so took it apart again now there is round impressions on the metal diaphragm where the springs are so does that mean my diaphragm is bad sorry for the long post and any help will be appreciated thank you