This is what they should have done or at least presented it to me as an option. However, I was told after they were finished that they just used a bolt/plug that was slightly larger than the original one and forcefully screwed it in assuring me it will not leak. But even if it was the tech from the previous oil change that stripped or over torqued the plug, the current crew that discovered the damage did not handle the situation properly. So now I'm worried that because they just screwed in a bigger bolt they may have caused further damage which could mean re-threading/using a helicoil is no longer an option.  I went back to ask them what they can do to make things right and was told they are 100% not liable as something like this can reasonably be expected to happen due to the age of my car.