DennisB DenLorsTools.com © Summary: Here’s a common question we get when it comes to Ford spark plug blowouts and which kit to use on 2001 and up Ford RF-1L2E Romeo style heads. Because of the extra step material the spark plug may sit up a little higher if a counterbore is not used. Then there’s the issue with parts store kit like the Helocoil Save-A-Thread kit that commonly fail making the hole bigger, which requires an oversize repair kit. We deal with this all the time. The heads can be saved in most cases if done properly with a good quality kit like the ones we sell.

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DennisB DenLorsTools.com © Summary: More than great pricing on the 38900 kit and replacement insert pn 389-100. We’ve been selling the 38900 Ford spark plug thread repair kit since 2005. The image of the 389-100 insert was our original pic that has been used by many websites after carefully cropping out our web address (see below). One thing that the other websites cannot duplicate is our experience when it comes to spark plug thread repairs kits and repairs.

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DenLorsTools.com Summary: Since 2005 at DenLorsTools.com and now our most recent tool website, WiseAutoTools.com, we’ve been answering questions on Ford spark plug thread repair kits. It always amazes us that there’s always new questions. A recent inquiry was regarding a 1998 Lincoln Navigator blown spark plug. I recommended the 5553 thread repair kit for the job. The Lincoln Navigator owner would prefer to use the less expensive Calvan 38900 kit and questioned why I made the recommendation that I did. Below is a copy of our correspondence.

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