Stripped exahust thread repair?

srcarr52 · Mar 29, 2013

This is not the way to do it. 1/4x20 steel nut zerts and lots of loctite.

Before Christmas R2D put up a thread of how to repair this 2100 so feeling in the Christmas spirit I offered to fix it for free. Fast forward to late February and a it finally arrives on my door step. First step... get the remaining insert out and survey the damage.

I think inserts are out of the question now.

Fish · Mar 29, 2013

Stephen C. said:
not much left to work with, it looks like it is time to cut slots in the sides and convert it to use square headed bolts with the nuts put on from the front.

Why????

srcarr52 · Mar 29, 2013

Welding it up is the only option. So ditch cut and bead blast. I prefer to weld from the inside of the exhaust port so the outside and fins are left hopefully untouched.

How do you weld something so deep? First step... forget everything you ever learned about electrode stick out for tig welding. Turn up your gas flow and use a good gas lens to keep everything properly shielded.

After welding.

After sanding flat on the belt sander.

srcarr52 · Mar 29, 2013

After cleaning up the welds inside and around the edge.

Fish · Mar 29, 2013

cool, go for it!!!!

That ugly piston look better up top?

srcarr52 · Mar 29, 2013

I was really feeling in the Christmas spirit so I also offered to port it, so a little more grinding to be done. Sorry no before pictures just after porting.

barneyrb · Mar 29, 2013

Nice job on the repair......I wish I had a machine and talent for welding alum.....

srcarr52 · Mar 29, 2013

I went together with a much better used thin ring piston and new rings. Clean looking air filter cover.

srcarr52 · Mar 29, 2013

Stephen C. said:
nice..that is what a guy with the proper equipment and welding skills can do.

any concern about the heat warping the bore out of round?opcorn:

Nope. I've welded a lot of stock cylinders with no warping. I've measure before and after with a very accurate bore gauge and I haven't seen enough warping to worry about. AM cylinders are a different story, those wander all over the place when welded on. I had a NWP BB kit tighten up 0.005" on the cylinder extensions just being welded on.

srcarr52 · Mar 29, 2013

And since a everyone always demands a video. The bar is a 34", RSLHK chain (half skip), and 8 pin sprocket in about 28" of sycamore.

[video=youtube;biLq1NXY00A]https://www.youtube.com/watch?v=biLq1NXY00A[/video]

tpope · Mar 29, 2013

Nice repair

Sweet work. Thanks for sharing.

Jacob J. · Mar 29, 2013

Iowa Mafia gettin' er done.

srcarr52 · Mar 29, 2013

Jacob J. said:
Iowa Mafia gettin' er done.

That's how we do it around here.

Mo. Jim · Mar 29, 2013

Nice work Shaun,as always. Hedgefest is fast approaching,hunting parts and cleaning saws.

srcarr52 · Mar 29, 2013

Mo. Jim said:
Nice work Shaun,as always. Hedgefest is fast approaching,hunting parts and cleaning saws.

I'm good on parts... Short on time.

Jimmy in NC · Mar 30, 2013

srcarr52 said:
And since a everyone always demands a video. The bar is a 34", RSLHK chain (half skip), and 8 pin sprocket in about 28" of sycamore.

[video=youtube;biLq1NXY00A]https://www.youtube.com/watch?v=biLq1NXY00A[/video]

Looks great Shaun. Truly top notch work there as always.

Chris-PA · Mar 30, 2013

Very nice work! I wish I had the skills and equipment for welding aluminum.

belgian · Mar 30, 2013

Yup, very nice work.

I fixed a jug of a contra super the same way, and ended up quite nicely. Not as nice as yours, but hey, this is only the belgian mafia....:hmm3grin2orange:

Jeff Lary · Mar 30, 2013

Very impressed, great work I bet he was thrilled with it,.... I know I would be !

ErikTheRed · Mar 30, 2013

Sweet J***s!

That's some nice torch work.
Not to mention the finishing.

Stripped exahust thread repair?

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