Blog

This article is in video format at the bottom of the page! How severely can a spark plug hole in an aluminum engine head, which previously had a repair insert and has since blown out, making the hole bigger and showing signs of erosion, be damaged and still be fixable? Basically, there needs to be enough material to ream or drill out so that complete threads can be tapped to accept an oversize spark plug insert. The image above shows a spark plug hole after a Napa Fix-A-Thread insert failed, lea …

All thread lockers are not created equal. Most of us know that blue thread lockers are a temporary type that are made to hold things that you want to remove later without applying heat. And that red is a permanent type that is used on things that we probably would never want to take apart again. We recently had a customer that said his mechanic was using green because it's stronger than red. But what type of thread locker is really best for a spark plug thread repair insert? How much do you appl …