spak plug blew out on VW Jetta?

[cracker]

my GF's spark plug blew out its been looked at by a mechanic who works from home but doesnt have the tools to fix it as ti requires re-threading before a replacment spark plug can be fitted, how much would this likely cost roughly and any recommendations of soloutions would be much apreciated

 

[CyberdyneIndustries]

The solution is just that. Depends on engine size and which cylinder. Couple hundred, roughly.

 

[Dude]

its called a helicoil buy it from any autoparts store kit is about $10-$20
labor from some one who knows what there doing 1hour x labor rate