08S2000

I inspected and took photos of my retainers after a valve adjustment. After reading posts about how to inspect retainers and evaluating mine, I am leaning towards a conclusion that my retainers look "sunk" so possible that I have cracked retainers, especially when I compared to Soviet's photo on this thread (post #4) @ https://www.s2ki.com/s2000/topic/114...r-replacement/

The most difference I noticed was that my cotters look sunk where and Soviet's cotters look flushed with the retainers. Could it be a design change between ap1 and ap2 retainers? I am not sure if Soviet's photo was from ap1 or ap2.

I am hoping I am wrong. Below is a photo of my exhaust retainer for cylinder #1 @ TDC (I believe). Rest of the retainers look very similar so I chose a clear picture to post. https://www.instagram.com/p/BC05RGzEIQ7/

MY08 with 86k miles. How does it look?

Thank you for your time.

08S2000

Ok....I am answering my own question now. I searched more and found this thread differentiating f20c and f22c retainers.


https://www.s2ki.com/s2000/topic/442...ring-retainer/

Soviet's photo looks like a f20c retainer.

I still need someone to chime in to evaluate the condition of my retainer... thanks.

Billman250

Your Ap2 retainers are fine, guaranteed.

Broken retainers are a non-issue 04-09.

08S2000

I learned from the research that the design improved but did not know that it was a non-issue for ap2s.

Thank you for your input.

Soviet

Those pictures were indeed of my F20C retainers. Not a single one of mine was cracked but I upgraded anyway. As Billman said you should be good.

08S2000

Thanks for your reply. Now I know that oem retainers for f20c and f22c look different.

Slowcrash_101

They can crack, but you'll get valve float before that even becomes an issue. In other words you're more likely to bend a valve than crack a retainer.