Helicoil | Thread repair 

I used a helicoil repair on a stripped exhaust stud insert on my Harley Shovelhead. I used a drop of locktite on the coil. This was over 5yrs back,no problems. Love these kits.

Very simple explanation. No nonsense, no fuss. Exactly what I needed!

Great Video, Never had to do a Thread repair until my Brake Caliper bracket stripped a bolt, Tried a Tap but thread had gone, Have ordered a Helicoil Kit and now feel more confident, Thanks for showing and explaining what to do, cheers.

You're the only one i've seen so far to use proper cutting fluid with the tap. You win the prize. Nice to see it done properly! Now to fix the cylinder head on my dolomite...

Had the pleasure of watching a guy in my shop use one of these. Had to watch a video on it. Fantastic commentary and instruction!! Thank you so much.

I allways wondered how they worked,very helpful video

THANK YOU!! This was the best/shortest vid I found for explaining how to use the helicoil.

From one video maker to another, thank you for a quick, concise, and steady video. All the best and God bless.

Te felicito, tus videos son muy graficos; y aun aquellas personas que no hablan ingles; lo entienden ya que puedes mostrar tus conocimientos; de manera impecable. Eres un buen Maestro. Gracias, me he suscrito a tus videos. Gracias de nuevo.

Looking at videos all week this may be my favourite no nonsense, clear as day video. Cheers

Thanks very much. Very helpful video! I was confused when my instructions said 'remove the tang' so I came to RU-vid for help!

Thanks for that. Straight forward, easy to understand instructions. A great help.

Thank you for the great tutorial. I followed it this morning and it worked perfectly.

Thank you very much, i did it and your video made the whole process a lot easier! Thank You!

Brilliant "how to" . Thanks very much for posting.

Very good video, very clear. I've just got to get the headless hex bolt out now!

Thanks for the effort on making all the videos!

This kit is awesommmeeeee!!!! Fixed up my snare drum snare strap holders!

Great stuff! Didn't even know these existed but could've used one a couple of years ago.

Helpful information. Thank you!

These work great in pinch for not so heavy duty use. In an industrial environment don't expect them to last. Best used to get a machine running now while you plan a proper repair later.

Interesting. Also very useful easy to follow instructions. Thank you.

Very helpful videos! Keep up the good work...

On the fitting tool there is a ring which is held down by a small allen screw. You should move this down so you push on the back of the insert when fitting, otherwise if you push too hard the coils separate and this makes fitting much harder. But otherwise nice video

Excellent video. To the point with no faffing. Thank you.

Lovely clear vid, good explanation. Thank you

Loved the video, loved the accent. Thank you, sir

Nice work and video! If I may add something, it would be this: If the job allows it and you have access to a press drill, use it! If no press drill available take extra precautions to ensure that you drill AND tap your damaged hole straight!! Installing an Helicoil insert at an angle slightly off 90 degrees will sometimes prevent from fastening your parts back together. Especially when you have many holes that needs a proper alignment with each other. If you repair through threads, on a hole that must be sealed (thinking of exhaust manifold bolts here) it's good measure to use a thread sealant such as loctite 2620. On your helicoil before you insert into your freshly oversized and tapped hole. Do not learn it the hard way like I did.

Thank you for a very well explained video.

No flannel ....straight to the meat of the video.lovely stuff. Thank you.

Thanks foe giving complete instructions and details.

You make it look so easy i need to do this with a 14mm one torepair my spark plug threads in the head but the tap wouldnt go down there ?

exceptional instructions thankyou helped me out big time :)

Fantastic video. Thank you

easy as that aye thanks mate im doing one on my oil feed line whie engines in car hope i get it straight thanks again

If you have to ran a tap anyways sometimes it's often possible to drill and tap for a bigger bolt size.

nice work, thank you for posting this video

great video!! thanks for posting!! Just wonder if the "Helicoil way" will sort my problem. Need to make new threads inside my BMW aluminium engine block. What do you think? Will it survive that pressure inside the engine?? Will it or won't??

Thank you, very helpful video. One question, how do you ensure that the helicoil insert does not unscrew again while undoing the bolt?

When you need to drill, work your way up to the size needed as indicated on the kit. Drill straight. Use a thread pitch gauge if needed. Get a drill bit set. A Time Sert kit is better because it locks into the hole. Use Loctite High strength sealer. Use wheel bearing grease on the tap. Clean the tap often. On this insert kit pictured, set the depth to 1/2 turn below the surface using the set screw on the tool. Autozone has kits like this. Amazon has kits with about 6 kits in one case.

Thank you so much. Now I can fix my oil drain pan drain hole.

Very helpful video - thank you.

I gave you a clap 👏 at the end of the video ! Good man

Brilliant thank you very much for video demonstration 😊👍

Great vid, and good to see that someone can actually use a tap properly, theres a vid knocking round on You Tube, where some gash bodger uses a cordless drill with his tap.................

Good video mate, cheers.

Bloody brilliant . thanks mate

Great video, many thanks

what if you don't have the room for a bigger bolt? like on castings were their is generally thin walls around threads? or internal parts of engine were the larger head of the bigger head will interfere with gasket seals/moving parts?

Lovely job!

@ultimatehandyman The ones I used last were German and they came as a kit with some locktight type adhesive and they gave a max torque you could tighten them to. They were bloody expensive when you used a few sizes. What do these work out at these days?

Yes. However, you must remember to use a very thick grease. Thick grease catch metal filings, which could get into the cylinder. The second important issue is the lenght of helikol. It can not be too long. At the end - watch out for the final breaking helikoli - not drop this part, into the cylinder. This method already repaired many threads without removing the engine head.

Great short no fuss video. So just to make sure, if I want to use a M8 bolt the kit's helicoil and drill will be slightly larger than M8? Just don't understand the concept of a helicoil if you already using a tap. Thnaks.

verygood short and well done how to video. .

great video. can anyone explain after you have tapped the hole, why do you need a thread insert? Can you now just screw the bolt into the thread you have just tapped?

What would you do in a situation where the thread length needs to be longer than a single insert? There doesn't seem to be different length inserts so im guessing the only solution would be to screw one in on top of the other.

Hi great vid my only question is how do I know which size helicoil I need?

Thanks for the clear instructions. Quick questions if I may; How do you break the end off and get it back out in a blind hole, and is there any good in using a thread locker on the helicoil to avoid it from coming out later?

Hat mir sehr geholfen!!!Danke!!!THX😁👍🏻

how tight can bolts get with heli-coil? I ask because I need to do this to an atv spark plug, and I was curious how tight it would end up getting

How "fluid tight" are these heli-coil? I have a stripped out oil check bolt on my dirt bike. If the heli-coil isn't tight enough oil will leak out around the threads.

Great video!! Thank you.

I need to do this for my 3800 series 2 , the power steering pump won’t hold in on the block. Every time I slap the belt it pulls it back out so this will be my next attempt using this method fingers crossed 🤞🏽

I subscribed to you now. Many good howto's 'ere! :D

i machine a lot of plastics and non ferrous metals as well as steel, and i have to use helicoils to strengthen holes for bolts. Included in the helicoil kit is a pressure collar that fits over the isertion tool and butts upto the coil itself, this collar exerts even pressure for insertion.why didnt you use it?

I'm getting ready to use this for the first time on a stripped bolt hole for a drive belt tensioner. Great explanation i feel more comfortable attempting this now. I just had a question about the inserts they all seem to be the same size do i need to combine multiple coils for a longer hole? And would I be able to break the tang on a blind hole? I only have about a 3cm hole I am rethreading.

I have threaded a head bolt in old triumph alloy barrels, will these be as strong as it needs to be ie; 20 - 25 pound torque?

Excellent video, perfectly clear. I need to do a sump and as it's a blind hole, I was wondering about the tang, looked through the previous comments and saw you mention it could be impossible to get it out of a blind hole. Do you think if I tied some cotton to it and punched it through I may be able to get it? It seemed to come off so easy that I don't want to leave it on.

Thank you. In an open ended hole there is the risk that the screw will make the helicoil go out when turning it, or the resistance of the helicoil outside thread is great than the inside? Or use threadlock in outside of helicoil?

Useful video congrats

Saved my day

I've not heard of helicoil before, i got the wurth time sert kit because you cut a recessed seat level with the top of the piece being re-theaded, in aluminium it stops more stripping also as it's cinched tight with the new thead insert & doesn't realy just on the cut thead & surrounding area as much, plus there's no mistake of pushing the new thread through & loosing it inside where you can't get. What is that last part with the punch supposed to do chez.

i got a #2 plug blown in a 99 4.6 e150 smh and i was wonderin if u got a answer for not having the heads and front motor taking off

Thanks very easy to follow! Possible to use a Heli coil on soft alloy?

Good video. Thanks sir.

I have m12 holes and m10 bolts ( not by choice), would an m12 helicoil be enough to allow the bolts to grip? Cheers

Need to do this on my boat motor gear case but I don't want the tang from the thread insert down inside the gear case. Any suggestions? I've got the Fix-a-thread kit, M6×1.00 but the drill is missing, of course! Don't have a chart with the correct size do you? Terrific video, to the point, spot on pal.

I stripped the threads to one of the bolts for the sump cover on a engine. It screws in fine. But once it gets somewhat tight it won't tighten any farther. Cause you said this won't work well in a blind hole. Is it possible to buy a shorter bolt so that it doesn't get into the bad threads. Pleas respond it makes a baseball sized puddle in a day.

thanks for the vid. I use helicoils since a long time and were always successful with them. Unfortunately i have to say 1. Helicoils original come in blue boxes and its a registered brand/technology from germany! Buy Original! 2. tapping thread should be done IMO when ever possible vertical to make 100% tapping straight. 3. its 1,5 turns in and 1 back, i couldnt hear the cracking sound of the tapping tool. thats what i learned 28years ago in mechanic school in germany.

Think I'll be doing a fair bit of this. Bought a motorcycle that's not quite what it seemed and bodge central. Cross threaded bits all over.

Nice video. ...but isn't the support ring on the shaft you use to wind in the thread supposed to be on the bottom of the thread. I have heard that you are not suppose to wind in the thread by the tang. ...because if the tang accidentally breaks as you are half way down to where the tread should be sitting (as embedded) then you are stuck and have to spend hours to get it out. The tangs do break, as you just showed. What do you think?

Nice and clear!

I stripped the threads in 1 bolt hole for an engine sump cover. 5 hp go kart. Is it possible to buy a shorter bolt because the threads are bad at the very bottom. It gets tight but not very tight before it won't get any tighter. Will that avoid the bad threads

M5 x 0.8 m5 is the thread size, 0.8 is the thread pitch (the distance in mm between the highest point on the threads)

Very helpful, cheers

Hi on my sump pan on a VW Golf a garage has tapped it with an M15 tap and put new sump plug in but it still has drip of oil because they havent tapped it straight. can it still be heli coiled after this? it hasn't been drilled just tapped but the sump is aluminium as well.

Great Vid! Thanks!

As an apprentice I was taught that dies need to be reversed to break the heel off, but taps simply screw in. The collar on the tool has an allen grub screw which should be moved up & secured using the allen key supplied with the kit. This is to centre the helicoil on the tool. Or is that unnecessary?

Great video yet again. I need to fit a helicoil in my caliper bolt hole. Where did you get your set from?

Cool english accent. Good video too. Gonna have a go at this now thanks!

minunat. dar vin cu o intrebare tehnica: poti strange acel surub la acelasi cuplu maxim in ambele gauri filetate? noul filet se comporta la fel de bine ca si originalul? multumesc.

Great video :)

Do you recommend to use that to repair the thread holes for a valve cover? Temperature is not an issue? It will hold?

Are all helicoil inserts the same across all manufacturers meaning would the thread cut to take an M8 helicoil for example be suitable for any other make of insert?

What if you cant go all the way through. i have to redo a thrad that has an end at the bottom. do i just reverse the drilling bit to take it out?

I think i paid £90 for my kit :...( & an extra M12 tap can't remember what for now though, the inserts & taps aren't that much now though. I can usualy find both pretty cheap on that bay place in diff'rnt metal types for the inserts i just need an M5 x 0.8 & M6 x 1 which keeps eluding me at a decent price. I'll have to look into a helicoil kit & prices when i get home to the uk. Thanks chez.

Can this coil be used inside a cylinder?My spark plug broke off and i might have to take off the head which is a lot of work!

do you ever put a bit of locktight on them?

very good job..

man that a very good video!! shows fast and simple!!! i need the kit for my triumph motocycle drain plug is size of plug 14mm x1.5 have the kit in this size? thanks