I am replacing the timing belt on my truck and now it’s time to tighten things up. I am trying to tighten the the Allen head bolt on the belt idler and it wants to tighten but just spinned as if threads were stripped, I backed out the bolt and it looks like whoever did the first timing belt used a helicoil insert on this. Truck has 202K miles so I assume using another helicoil will not affect the integrity or loosen up over time? Helicoil broke into pieces after bolt was out.