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Broken valve guide bosses. WTH?

Sirayden said:
There was a service bulletin about seals coming off. I think it was mainly for the exhaust valve seals.
Click to expand...

That would make sense if it was the exhaust. Plugs aren't fouled and no carbon on the intake valves, but great compression and only smokes a tiny bit when idling for long periods.

Is there any way to prevent this? I used felpro seals.
 


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