This Isn't Exactly a Camaro Issue, But....
 

My wife has the Cadillac SRX with the same 3.6 as the base Camaro. The coils are held down by a 10mm bolt that goes in a metal collar that rests in the composite head.

One of these collars no longer rests, and just spins when I try to tighten the bolt. Is there an epoxy (or any other method) that works to hold these collars in place after they've come loose?

Thanks in advance.