Heli-coil or tap?

aye mate

Hiatus over.
Mar 30, 2005
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As some of you know I am in the process of putting a new ct-26 on, and one of the bolt holes for the oil line flange became stripped in the process. My question is should I tap new threads into the existing hole using a STANDARD(its on hand) tap set or go buy a heli-coil kit. If I go heli-coil do I get the original size or a bigger size because the threads were stripped? Thanks everyone.
 

IHI-RHC7

"The Boss"
Apr 1, 2005
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Jake, which Bolt holes are you refering to?
Every oil fastener I can think of is a stud with nuts save the 17mm banjo...
 

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
SM Expert
Feb 10, 2006
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Pretty sure he's talking about the flange on the bottom of the CT26.

You can do either...I'd helicoil it myself...you can use the original metric size if you go this route. If you use a larger bolt/stud, you will likely have to make the oil flange bolt hole larger too.
 

aye mate

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Mar 30, 2005
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Yea I am talking about the flange on the bottom of the turbo. I figured that originally there were 2 studs there but I guess the previous owner lost one of the studs and just put a bolt through that hole from the bottom up. The reason the threads got stripped is because I put a new bolt through the hole and it was a smidgen too long, so it leaked a little bit of oil. I backed the bolt out and the end had gotten smashed on the bottom of the turbo when I cranked it down. So the smashed end proceeded to tear out all the thread as I backed it out.
 

aye mate

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[Sarcasm] I didn't know I lived in such a redneck area[/Sarcasm] I had to call 4 different auto parts stores and hardware stores to find metric heli-coils. One place didn't even know what a heli-coil was.
 

aye mate

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^werd. Mine was like 30 bucks, but now I can Heli-coil about 15 things that require 8mm-1.25. Actually I will probably never use it again.