exhaust manifold bolt has broken off, engine making loud tapping noise
my suburban had an idler pully put on wrong by a family member, which put a
strain on the engine and cause a loud tapping noise, I also found out that it had
also caused one of the bolts on the passenger side of the car from the exhaust
manifold to break off. can someone please tell me what the source of the
tapping is, and how to fix it