Home › Forum › Ask A Member › stripped spark plug thread › Re: stripped spark plug thread
It is very important to get the insert in square to the head face. Not all of us are machinist like Mumbles apparently is by some of the GREAT work we have seen him do. That is another good reason to take the cylinder head off. Even though the insert is a Heli-Coil product, I have always considered a Heli-Coil the second product. Just the threads which in my book are worthless even for bolt thread replacement. I have had a complete set of those (10/32 to spark plug sizes) in stainless steel for 25 yrs. I won’t use them. I only use stainless steel inserts, but they have never been Heli-Coil brand. I have always used an industrial brand because of cost and availibilty in quantities. I have seen too many problems with Heli-Coils in the way they were installed and come loose. Again just my opinion.
Dan in TN