How difficult is it to tighten these on my own? If I remove the turbo cover (doesn't look to difficult) will I see them? I want to give it a go but don't want to get into to find out I need a special tool or something to make it happen. I have the infamous 'diesel rattle when cold' and I feel that some of these bolts may be lose as it's gotten worse over the past 2 winters. Thanks for your feedback.

 

If there is a leak you might need to replace the gaskets. But no special tools needed.