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Need Cylinder Advice A65

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Captalbertq

Captalbertq

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Today I removed my spark plugs for cleaning and #1 bottom felt funny unscrewing as it has before and when reinstalling the plug, the Heli-coil peeled out of the cylinder. Obviously I'll have to remove and repair or replace. I reviewed my engine log and it was majored in 1980, 750 hrs since. It has three .15 over pistons but this cylinder was chromed to standard. I briefly looked at Millennium but see they are currently unavailable. Any guidance would be appreciated.

Thanks, Albert 😕
 
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