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Q: Why are the rocker arms working themselves out of the cylinder head? on 2003 Buick Century

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Two separate instances of this problem about 24 months apart. Now showing same symptoms again. Wish Buick would address the fact that there's a design flaw with this engine.
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I should have mentioned that I am NOT a mechanic. My local shop is great and fixed the first two cylinders that did this. They used I believe what they called a helicoil? I suppose I'll just end up doing this again when the next cylinder bolt lets loose.
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