interesting. I was watching a video earlier today showing a guy (with a strong accent) replacing his manifolds. I’ll have to look again to get a better feel of where I can see the manifold shield. You are saying best access is through my wheel well? Does that mean I need to remove the tire to get to it?If you wanted to you can check to see if you have a broken stud bolt by yourself. Make sure the truck is off course cold and sitting for a while. What ever side you hear it loudest on (or both). Reach in through the wheel well and pull on the the manifold shield and see if there is any give. This is how I was able to verify what side I had studs broken on and how many.