Join Date: Jul 2011
Location: Cologne, Germany
basically I can't see a pothole breaking a manifold stud, but there you go, and something obviously broke it (unless it was cracked thru the various heat cycles and stress)...the manifold would smash first, imo.
a leaking exhaust manifold normally sounds like a bad spitting, but can sound like a rattle can, depending what's going on.
you checked the exhaust manifold for damage?
have your engine mounts split?
Have you a sump guard fitted?
first is first though, remove the manifold, it has to come off in any case.
Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.