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Advice needed for thread inserts

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#1 grannyknot


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Posted 13 February 2017 - 09:20 AM

I turned up an aluminum adapter to join a bmw driveshaft to the r200 diff, I'm worried about the soft metal threads and not being able to torque the M8 bolts on the diff side. I can't mount a fixed stud because there would not be enough room to install, can't use nuts to sandwich the flange.

I may have to remake the adapter in steel but want to try and make this work first if I can.

So I'm thinking some kind of Helicoil or maybe an interference fit threaded insert.

Would appreciate any advice,



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#2 Derek


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Posted 13 February 2017 - 10:08 AM

I use http://www.timesert.com  I like them better than helicoils for high load items. Ebay is usually loaded with kits. 

EDIS Mounting kits are BACK IN stock!!!

#3 Neverdone


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Posted 13 February 2017 - 10:09 AM



I was just gonna run this and hope for the best! I might safety wire the bolts on the driveshaft side. Maybe re-make the whole thing with a thicker piece of aluminum. Who knows.

Edited by Neverdone, 13 February 2017 - 10:10 AM.

#4 torynich



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Posted 13 February 2017 - 05:46 PM

Keenserts are a good way to go also


#5 grannyknot


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Posted 13 February 2017 - 07:35 PM

Thanks boys, those are good products.

#6 clarkspeed



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Posted 21 February 2017 - 04:22 PM

Timesert or kleensert

S30 Motorsports: Restoring, building, and racing vintage cars.  Current projects: 71 240Z CP Bob Leitzinger tribute vintage race car, 70 240Z partial tube frame IMSA GTU vintage race car, 60 Mini Cooper vintage race car.  "If you are under control you're going too slow" - Parnelli Jones

#7 Grim



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Posted 27 February 2017 - 07:59 AM

I just came across this video and though of this post. The results were surprising to me.

"We're all a bunch of mugs! We work twenty-four hours a day, don't eat; we don't sleep and we spend all of our money just so we can go out again next Sunday and break the damned car." - Horst Kwech, circa 1970

#8 grannyknot


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Posted 27 February 2017 - 02:50 PM

Timesert kit arrived, very impressed, well thought out. I think it is going to do the trick.

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After drilling out the threads and counterboreing,

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re threaded, cleaned and ready for the insert,

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Loctite on the outside threads of the insert,

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I ordered the 16.2mm long inserts so I could use the full thickness of the flange

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