Folks have been polishing their rockers for a long time. Afaik, neither blindness nor other complaints have resulted.[/quote]
Just because no one has complained doesn’t mean the rules say that you can. I am not saying there is anything wrong with doing this, just pointing out that the rules don’t allow it when I read them. I paid the big bucks for all new OEM BMW rockers in my motor build, and I haven’t had any rocker failures on any of my OEM BMW rockers. Here are the rules I would expect someone to quote in a protest:
[quote]184.108.40.206.6. No engine component may be modified in any manner not specifically permitted
or authorized by the Factory Service Manual, the Bentley E30 Manual, or Factory
220.127.116.11.7. Overhaul procedures which in any way may increase performance beyond factory
specifications that are not specifically authorized by these regulations are
prohibited, (e.g. porting/polishing, etc).
18.104.22.168.3. Only OEM cast rocker arms, exact cast copies, or heavy duty cast rocker arms
(Ireland Engineering part # M20rarmHD) are allowed.[/quote]
If there is belief that there is no performance advantage and only a reliability advantage in polishing the OEM cast rockers, then I would ask that rule 22.214.171.124.6 and 126.96.36.199.3 be modified.