While out today i noticed my exhurst was blowing from the outlet part of the cylinder head i noticed a bolt was missing one side has a bolt for a nut to attach the other side has nothing, has the bolt snapped or is it a special bolt that screws in i have added a photo hope this helps.
Looks like the stud has snapped You're going to have to remove the remaining part of it with an extractor and fit a new stud. If the exhaust outlet has a gap behind it and you can get behind the stud hole then it might be possible to remove the remaining part of the stud without an extractor
