Fixing a head question

[drewzx3]

I was thinking about buying a set of edelbrock performers from a guy and he said the only problem was one of the heli-coil's were coming out. About how much would it cost to have this fixed by a machine shop?

 

[SQUEEZE&STROKE]

Probably shop minimum...$80-100


The question is WHY is the helicoil coming out, and which side it is coming out of.