[Clyde]

I have seen over a dozen different types of retaining rings for wrist pins. I have seen where the same piston manufacturer has used two different types during a production run. I have seen and used the type that looks like the snap ring for external u joint that was used in the above piston with the broken snap rings. Under light load conditions like the V6 and under 4500 -5000 RPM's most any snap ring will work if installed properly. If the rod is bent or the wrist pin bushing is wearing out then that will put an extra load and can break a snap ring.