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Sheared off bolts and the right HeliCoil

  • Thread starter Thread starter doctorgonzo
  • Start date Start date
Sniper said:
Not trying to hijack the thread, but I've heard bad things about helicoils and am looking for other options for fixing sheared bolts (as there are 4 sheard exhaust bolts on my 850). I've seen other kits that would work, but they are really spendy!!! I also saw in another thread that someone drills, taps and locktights an alluminum rod into the old hole then taps it to replace the old hole.
This got me wondering if a person could drill the old bolt out, tap the hole (to create a jagged surface along the length of the hole), inject some sort of epoxy into the hole, and place a stud (of the correct size and projection) into the epoxy using the connection peice as a guide for proper placement of the stud. Has anyone tried anything like this? I found an epoxy called quicksteel that says it could be tapped also, so that could possibly be an option of using bolts instead of a fixed stud with a nut. I'm just not sure about the expansion/contraction of the block compared to they epoxy, if that could be a problem.
Just looking for some wisdom on the matter.
Click to expand...
I remember reading about someone doing something like this, don't remember how their luck went though.
 
Sniper said:
Not trying to hijack the thread, but I've heard bad things about helicoils and am looking for other options for fixing sheared bolts (as there are 4 sheard exhaust bolts on my 850). I've seen other kits that would work, but they are really spendy!!! I also saw in another thread that someone drills, taps and locktights an alluminum rod into the old hole then taps it to replace the old hole.
This got me wondering if a person could drill the old bolt out, tap the hole (to create a jagged surface along the length of the hole), inject some sort of epoxy into the hole, and place a stud (of the correct size and projection) into the epoxy using the connection peice as a guide for proper placement of the stud. Has anyone tried anything like this? I found an epoxy called quicksteel that says it could be tapped also, so that could possibly be an option of using bolts instead of a fixed stud with a nut. I'm just not sure about the expansion/contraction of the block compared to they epoxy, if that could be a problem.
Just looking for some wisdom on the matter.
Click to expand...

You're right, helicoils are complete junk. I put some info in this thread that you may find useful - http://www.thegsresources.com/_forum/showthread.php?t=123303 scroll down to the 3rd post.
 
Last edited:
psyguy said:
do you know if there are timeserts (or similar inserts) that can be installed when an application calls for a fitting FLUSH with the surface (and not slightly raised like with regular timeserts)?
Click to expand...
Yes there are. I will try and dig up the name of them for you and post it here. They use them in race car engines all the time where two surfaces need to fit flush (manifolds etc).
 
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