the retainers you have are for a smaller dia. spring - thus the ID of the spring is moving around quit a bit on the retainer. Id change to the correct size for the spring ID/OD if you want some longivety. JM2CsW.
Yea, my thoughts exactly, this will be the 3rd go around on these heads to "get them right." needless to say, I think I will have an active roll in round 3 if these have to come off again.