427 broken valve spring

[RET_COP]

Correct Tom. I always go to the circle track/endurance section to select my springs. I check the pressure every winter and I TOSS Them in the garbage every few years and rebuild my lifters. I'll add- if I think they need it. (solid roller)

[55312]

Not long after getting my 427 Center Oiler I began breaking valve springs. I called George Anderson at Gessford Machine to pick his brains and he had me send a whole good spring stack to him including shims and spring cup. He got back to me right away and said they had the wrong spring cup. He offered to order a new set of Comp springs and cups and had them drop shipped to me. No more broken springs. That was 14 years ago. Great guy to deal with. So are Brent Lykins and, before he retired, Keith Craft. They are willing to help out and in return, you can get any parts you need from them. It's worked for me a few times.

Tim

[era427tp]

After having a 427 for a number of years ,the best advice I got and will pass on is this.Change valve springs every 3 years regardless of use

[Gaz64]

Looking at your first pic, something doesn't look right with the valve keepers (collets).

One looks bigger than the other, one normal, and one small or broken.

Perhaps the retainer was unstable, and caused the spring fracture.

I find it hard to believe the valve is not bent, your noise on that bank proves it is not seating as well as the others.

Gary

[Robert Beede]

Moriarty: My Friend, after going to the arduous task of removing the head....WHY wouldn't you take it to a master mechanic for disassembly and inspection? From your description of events, you never truly identified THE CAUSE for the spring failure. Now, all of us engaged in this thread have to wait for you to get professional assistance for both you AND your car, to learn what caused the broken spring!😆