I was tighting one of the bolts on the primary injector rail and broke one of them. I drilled the bolt out and re-tapped it, but i drilled a little too much around the top and it isnt working. Is there any other way I can seal it on one side of the rail without causing a major vacuum leak? Thanks

 

What you drilled out to much of the center housing? Or the the Rail?

 

where the two 12mm bolts tighten into the motor to hold the injectors down

 

So you drilled to much out of the Center housing. You are still ok if you didn't drill to deep.

You have a few options some expensive some relitivly cheap.

1. you can coat the bolt in some grease and add some jb welt to the hole and install the bolt. it sounds dumb, but you will be amazed what that stuff holds up too.

2. you can enlarge the hole to add a lager standard or metric bolt.

3. Go get a heliacoil kit and intall it.

Good luck and try not to get frustrated.