How to Repair a Cross-Threaded Spark Plug Hole MethodDescription of the FixMethod 1: A HelicoilThis fix simply allows you to use a “coil” or thread that fits in between your stripped spark plug hole and bolt it down, securing everything back into place.MethodComments on This First Approach While TurningThere is an entire process involved around using just this round heli-coil tool at various stages.Moving onto More Advanced Fixes Below…4 more effective fixes. Although traditional wisdom—and some Hemmings readers—counsel removing the cylinder head to either tap or chase the threads, it is possible use a few tricks that can save both time and money.
Back Tapping Method
Another common way to do this is the back tap method (without removing the heads). This method can rectify the thread alignment utilizing a dedicated tool and without major disassembly work. The procedure is pretty basic and can be achieved with the engine in the vehicle, which substantially cuts down on labor costs as well as downtime. It has always been a favorite of legions of DIY and pro enthusiasts alike as this not only restores the integrity to the threads but also maintains original strength in spark plug hole.
DIY Spark Plug Thread Chaser
If done by those who like tinkering, a self-made spark plug thread chaser can prove to be of great help. You can make a damaged thread cleaner from an old spark plug with some grooves cut in it using a rotary tool. It works particularly well for small mistakes of cross-threading and needs very few tools or materials. Nevertheless, care must be taken before altering the frenzied metal and harm to your engine.
Professional Repair Kits
Kits such as Helicoil or Time-Sert are great options for more significant damage. The kits come with inserts to reinforce the spark plug hole for maximum durability and longevity.spark plug repair (ad) While these options may carry a higher up-front investment, they will be long-term solutions that are likely to outlast budget auto parts store remedies.
In effect, where vice traditional methods require much labor; alternatives that do not take as long like back tapping and DIY tricks provide convenient ways to correct it cross-threaded spark plug holes.