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When a Save-A-Thread insert fails, it can leave the spark plug hole in your engine significantly larger than its original size. This scenario often requires more robust repair solutions, such as the 389XL Triple Oversize Thread Repair Kit. Here's a comprehensive guide on how to tackle this issue effectively.Understanding the Problem Spark plug threads can become damaged or stripped due to various reasons, including cross-threading, over-tightening, or the failure of previous repair attempts …

DennisB WiseAutoTools.com © Summary: Information on getting an add-on kit for the Time Sert 5553 kit to allow it to do larger diameter repairs when other repairs have failed leaving the hole too big to fix. With so many temporary, parts store type spark plug repairs out there, it’s no wonder that shops are seeing “mangled” failed repairs that have made the spark plug hole too big for the TIME-SERT 5553 kit to handle. The 5553 kit works great on holes up to .66″. Anything larger than that ne …