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Re: Rotor Button
Sounds to me like the valves are rattling at start up until the lifters pump up , how many miles are on the engine ,has it been redlined any during its life that could have floated a valve as for the rotor carbon build it is normal wear over time now if it is bad it could cause a alternate spark route to another cylinder untill it runs a while . That would cause a sound like rattling but it is more of a sparknock.
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