How to fix a stripped bolt hole

  • Posted by Matt Gieselman on December 28, 2008
  • 0 comments

While restoring an old carburetor I found out that a couple of the bolt holes were stripped, the fix for this is a Heli-Coil kit.  The kits include a drill bit, tap, coils and an installer tool.  The basic steps are outlined below.

1 Here is a coil threaded on to a stud before installation, as you can see the 5/16-18 coil fits perfectly. heli_coil_0002
2 Next drill and tap the stripped hole using the drill bit and tap supplied in the kit.

Tip: Using a cutting oil or other light lubricant will make it easier to thread the new hole. 		 heli_coil_0004
3 Put the coil on the installer tool included in the kit, notice the tang going into the notch. heli_coil_0007
4 Carefully thread the coil into the hole that you just tapped. heli_coil_0008
5 The finished product is shown to the right. heli_coil_0006

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