The International Cessna 170 Association

Posted: **Mon Apr 02, 2018 10:23 pm**

Can Helio - coil be inserted without removing the tire and tube?

Posted: **Mon Apr 02, 2018 11:18 pm**

In a wheel for the cover? If you drill through the rim the wheel would be toast any way, but much easier to do on a bench. One of my wheels has been drilled and tapped for a size up, which while a pain is simpler. I think it may be a bit shalllow for a heli-coil anyway?

Posted: **Mon Apr 02, 2018 11:44 pm**

Thanks for the info

Posted: **Wed Apr 04, 2018 3:22 pm**

You can shorten heli-coils. You just want a couple coils to hold. We use them a lot.

John

Posted: **Wed Apr 04, 2018 4:36 pm**

I like Pete’s advice here:

pdb wrote:Just a heads up. I went into our local aviation parts store, found a new Cleveland wheel and bought a number of the machine screws that fitted perfectly and were the correct match. At the field I took the new screws out and discovered that the previous owner (>20years ago) had already drilled out and retapped my wheels to the next size up. Now those threads are mostly stripped.

I was given one word of caution about the use of helicoils worth considering. A steel helicoil in a magnesium wheel presents the potential for corrosion as a result of the contact between dissimilar metals.

I still haven't fixed my wheels and I am now leaning towards cleaning out the holes, filling with JB Weld, and retapping.

Looking online for epoxies to use for thread repair I’ve seen mixed reviews ... but wouldn’t hurt to try.

Posted: **Thu Apr 05, 2018 12:36 am**

One unauthorised repair that I have seen on a rim that has been drilled all the way through when going up a size on the hub cap attachment screws was the repair was carried out with heli-coils and then the area was filled with PRC1422 and the screw was inserted with grease on it so the PRC doesn’t stick to the screw.

The International Cessna 170 Association

Helio -Coil

Helio -Coil

Re: Helio -Coil

Re: Helio -Coil

Re: Helio -Coil

Re: Helio -Coil

Re: Helio -Coil