Heli coil for stripped injector holder bolt om642

[Iskapsts]

To view this content we will need your consent to set third party cookies.
For more detailed information, see our cookies page.

Accept third party cookies

Hi guys, I’ve probably rushed and messed up injector bolt thread in valve cover at 2nm only , from what I learned now I didn’t clean the injector hold down screw bore and stripped thread
I’ve got heli coil set as only option in my view in attempt to get it done.
I’ve never done it before(taping)
Any suggestions, recommendations,
How much nm torque even these heli coils can hold?

Regards Igors

 

[OneForTheRoad]

Use a bolt thats shorter than the depth of the hole , the helicoil will be fine , use lock tight on the tapped thread to hold the helicoil in place , if you feel it necessary.

 

[DSM10000]

It is very easy to cause much more damage if you are inexperienced with these repairs.

The best advice is to get it recovered to a garage with experienced staff

 

[Petrol Pete]

Thread inserts or 'Helicoil's' (trade name , Hoover anyone ?) are often stronger than the thread they replace due to larger surface area on the outer side of the insert.

I have lost track of how many of these I have fitted over the years but as said , if its the only head you have (highly likely) and you have never fitted one before I would suggest either practicing on a lump of aluminium or paying someone else to do it.

Good luck

 

[zipdip]

Well Helicoils are not hard to do,drilling out hole tapping it and then inserting the Helicoil, and breaking the tang off,for you the problem may well be where the hole is,drilling the hole may well be easy,but do you have clearence to use the tap,if you have then give it a go,make sure you blow out the hole,a bicycle pump will do the job.

 

[Petrol Pete]

Thread inserts also come in different lengths but if too long they can be cut short (larger hole size ones are easier to cut down than smaller ones) . There is also the option of filling the hole and starting from scratch.

But thats another skill set altogether.

 

[KennyN]

The biggest problem is that you are trying to drill the hole for the Helicoil tap that is only slightly larger than the hole that is there at the moment , this will be almost impossible to get true and too size as the drill will be bouncing around all over the place and will bite into the head material as soon as you start , causing more issues.

The way to do it properly will be using an end mill or slot drill in a device that is clamped solid to increase the hole diameter which will accept the tap for the Helicoil insert.

How much of the actual thread in the head is actually stripped ?

K

 

[Iskapsts]

Hi guys, thank you everyone for help/ suggestions, managed to repair thread, looks and holds well now, but as can see in video another one is leaking unfortunately, it might be harder with this as the brake servo needs to come out, never took servo out, hopefully not too big of a job.

To view this content we will need your consent to set third party cookies.
For more detailed information, see our cookies page.

Accept third party cookies