[Zedn]

yes, it has to come out to remove the bolt. 7/16 UNF from memory. I used standard grade 8 bolts to replace mine. If you can source those suggested by Iva Bigan it would make tightening easier. Otherwise regular bolts work its just fiddly holding a spanner back their. Replace the nuts with crushed nuts whilst at it. I wouldn't use nyloc there cause of heat.