Stripped head....helicoil?

[Jason280]

Buddy of mine brought over a low hour Husqvarna 350, spark plug threads have stripped out of the head. Not sure how this managed to happen, unless the plug was never properly tightened. Other than pulling the head and attempting to weld up/drill/tap a new hole, are heli-coils a reasonable repair option?

 

[Bill G]

Heli coils are crap. Use a thread sert

 

[heimannm]

The "spring" type helicoils are not a good choice here. The HeliCoil Sav-a-Thread insert is a good option. They supply a tap to run the threads out overside and the insert is locked in place with a special swage tool. Kits can be found at most auto parts stores and replacement inserts can be purchased.



Mark

 

[Chevboy0167]

Cheap option...

https://www.amazon.com/Heli-Coil-Helicoil-5334-14-Thread-Repair/dp/B0002SRF4O
Or probably the best but more expensive option...

https://www.amazon.com/Time-Sert-M1...mzn1.fos.f5122f16-c3e8-4386-bf32-63e904010ad0

 

[heimannm]

I have the Time-Sert tools available for the washer seat inserts if anyone is interested in buying a set. You'll have to go on line to get the inserts.



Apparently McCulloch anticipated a lot of spark plug thread repairs and had purchased a quantity of the tools shown above and I ended up with them in a large parts lot acquistion.

Mark

 

[Up A Creek]

Definitely an insert vs a spring helicoil.
The jugs usually come factory with an insert.

 

[Stihlhead517]

I just picked up a save a thread kit at advanced auto for. $38. It comes with 3 inserts you will need to use the shortest of the three. Time-Sert is a better option but it's expensive, around $250 for a kit. Like everyone says an insert is a better option then a helicoil. You will also need some high temp RTV to seal the threads.

 

[Chevboy0167]

I do have 1 of these kits but have not tried it yet.....

https://www.amazon.com/CALIDAKA-Pro...rnid=2470954011&rps=1&sprefix=,aps,269&sr=8-4

 

[L34]

The last 2 I did (064) I used key serts
But key sert plug thread size seems hard to find now down under.

 

[rocketnorton]

The jugs usually come factory with an insert.

You will also need some high temp RTV to seal the thread

???

 

[Chevboy0167]

https://www.ebay.com/itm/3048352751...gi0W+VSKIJkZDKRw/wcet3dK2t|tkp:Bk9SR8bdworpYQ
https://www.vibra-tite.com/threadlo...t-lock-extreme-high-temperature-threadlocker/

 

[angelo c]

Have had good luck with Time-sert. Not so good with Helicoils.
Hth

 

[angelo c]

I have the Time-Sert tools available for the washer seat inserts if anyone is interested in buying a set. You'll have to go on line to get the inserts.

View attachment 1071694

Apparently McCulloch anticipated a lot of spark plug thread repairs and had purchased a quantity of the tools shown above and I ended up with them in a large parts lot acquistion.

Mark

Mark. What's the asking price for the set. Pm if you don't want to say

 

[Stihlhead517]

I would also be interested in the time-sert tools too?

 

[heimannm]

For the next 20 sets or so, $45 shipped in a small flat rate box. After that, the step taps will be gone but I'll still have the other three is good supply.

Mark

 

[angelo c]

For the next 20 sets or so, $45 shipped in a small flat rate box. After that, the step taps will be gone but I'll still have the other three is good supply.

Mark

Pm your info. I'll be yer huckleberry

 

[Stihlhead517]

Me too! Send me your info and payment method and I'll probably get one too. Do you have a part number of the kit so maybe I can go look online to see what's in it? I am not familiar with time-sert, all I know is they make good stuff.

 

[heimannm]

I only have the part numbers McCulloch assigned to the individual pieces as shown above. The guide is actually 92130...

See the Timesert page for their kits and numbers: https://www.timesert.com/html/sparkplug.html

I was able to get the inserts and some individual tools from: https://www.mechanicstoolsandbits.com

Mark

 

[Stihlhead517]

I definitely want one! I'm set up with PayPal if that helps? Just lmk how you prefer to do this? I have heard nothing but good stuff about-sert!

 

[Bill G]

I will take a set as I believe my son took my time sert tools.