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WiseAutoTools.com © Summary: Help is here for cases where the Dorman Cylinder Head Repair has failed and has made the spark plug hole too big to fix with a parts store kit. We get calls frequently from vehicle owners and auto repair shops that are looking for a spark plug thread repair that works when a Dorman 42025 spark plug thread (cylinder head) DIY repair kit has failed.  Napa calls it the Spark Plug Re-threader Kit and Advance Auto Parts calls it "Help Cylinder Head Repair Kit". …

DennisB WiseAutoTools.com © Summary: We’ve been selling spark plug thread repair kits for many years to vehicle owners and repair shops for Ford spark plug blowout repair. We answer frequently asked questions and go over concerns regarding common misconceptions. Although other vehicles can have a sparkplug blowout or ejection problem, this article is primarily on 1996 to 2012 Ford 4.6, 5.4 and 6.8 engines. The most common kits we sell are the Calvan 38900, the TIME-SERT 5553 and the l …