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Stripped thread bodge

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Merco 6113/07/2018 10:49:20
54 forum posts
19 photos

My latest unmissable eBay purchase and bargain.OS 120 .Exhaust bend loose in cyl head,closer examination seems to indicate it had been glued in.Threads in cyl head very worn.New head too expensive .Any suggestions for a high temp compound that might give a fix,albeit a once and for all,never unscrew again solution.

Dane Crosby13/07/2018 10:55:32
245 forum posts
23 photos

Hi, Maybe the high temp silicone sealer used to seal joints on wood stove chimneys? I have never tried this so cannot guarantee it would work. Good luck with it.

Ace13/07/2018 11:53:17
322 forum posts
23 photos

I have had good results with J B Weld (original cold weld). steel epoxy.

So long as the metal is absolutely clean it sticks like snot to a horsehair blanket - and is hard and good for 300c.


Seems that it may now prove difficult to obtain which is a shame sad

If you can find some grab it - it is good.

Edited By Ace on 13/07/2018 11:54:03

Edited By Ace on 13/07/2018 11:59:24

Bob Cotsford13/07/2018 11:54:20
8591 forum posts
483 photos

There's an advert that appears regularly on the BMFA classifieds for stripped plug repairs, it may be worth contacting him. IIRC there's a fair bit of meat for a helicoil on the 120.

RichB13/07/2018 12:11:45
85 forum posts
1 photos

If you can't get the thread repaired, then JB Weld would be my recommendation but as Ace said, the parts must be clean.

Merco 6113/07/2018 23:37:30
54 forum posts
19 photos

Thanks for your help, will look out for the helicoil ads on BMFA.Have found some JB Weld locally and will give it a try. Ace,I now remember why we dumped the horsehair blankets.

Former Member13/07/2018 23:51:08
3577 forum posts

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