[rvanstory]

I'm posting a new thread to a previously asked question that has not been answered yet. (NOTE: Got lots of answers and suggestions to questions that were not asked. )

Monday I am installing a new heli-coil in my Lycoming IO-540 after the original threads were damaged. I ordered the aviation specific heli-coil from ACS.
https://www.aircraftspruce.com/catalog/eppages/helicoil.php

Here's my question, do I have to use the Lycoming staking tool in order to use this aviation type heli-coil (with serrated edge)? I have a "standard" heli-coil insertion tool, but standard heli-coils do not require "staking". If I use this Lycoming heli-coil with the serrated edge, can I successfully install it using a standard insertion tool without staking?

Anyone else done this successfully, or not?

 

[rocketman1988]

You cold likely install the helicoil but if you do not stake it, it will probably come out the first time you remove the spark plug.

 

[Bavafa]

I don't have the answer to your specific question but when I installed a helicoil, I followed Lycoming guide which specifies a special helicoil that is .002 larger and uses the staking tool.

 

[rvanstory]

I don't have the answer to your specific question but when I installed a helicoil, I followed Lycoming guide which specifies a special helicoil that is .002 larger and uses the staking tool.

Where did you get the staking tool? I see where to buy it for over $2k. Did you find a source to rent it? If so, would you mind sharing?