Whilst removing the exhaust housing from my Garrett GT28R turbo, the thread of the bolts sheared off and needs replacing.
It's a blackened bolt, so I'm not sure if this has any significance? (heat resistant coating?). My question is can I replace these bolts with standard zinc plated grade 8.8 or grade 10 steel bolts? Or do they need to be some kind of heat resistant bolt/coating?