Exhaust threads repair

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fiatfan

fiatfan

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On my 850 the PO have "up-graded" the exhaust pipe fastening to the head....or not... Looks like sh-t, and is not very well made either. And the original threads are totally gone. So I stumbled on this company, Seager engineering, in GB who does thread repair, looks really nice. Comes at a cost of course, but what do you do? Does anyone have anything to say about them and their work?

https://www.facebook.com/seagerengineering
 

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fiatfan said:
On my 850 the PO have "up-graded" the exhaust pipe fastening to the head....or not... Looks like sh-t, and is not very well made either. And the original threads are totally gone. ...
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you are correct, what is left looks like $h!t. but i kind of like the the 2 stud conversion... hope it works out. :D
 
Have you considered Jim Comstock's repair? He does very good work, isn't cheap but quality seldom is.

John in Texas
 
N0rt0nelectr@ said:
Have you considered Jim Comstock's repair? He does very good work, isn't cheap but quality seldom is.

John in Texas
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Well since I live in Sweden it´s probably cheaper to buy a new head than send it to him and back.....apart from that it wouldn´t be a problem. I´ve seen several videos and read a lot about Jim, I know he´s pretty fantastic.
 
850commando said:
you are correct, what is left looks like $h!t. but i kind of like the the 2 stud conversion... hope it works out. :D
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The idea is kinda ok, but it´s really sloppy work. The studs are loose and probably need new threads, so....Would be much better to have inserts of this type done.
 
What is the cost difference between a good thread repair and new head? Is the thread problem the only issue with that cylinder head? Something to think about.
 
No need for machining in my case, on one side +15 thou works on the insert OD, +30 thou on the other used to recut a thread manually and a +20 thou insert fitted after.
 
i think Jim Comstock was only charging ~$200 range to do the thread repair, and a new head ( the only acceptable) is a ~$3000.

if the guys suggested in England have good reputation, then thats the way to go, I have a Jim Ctomstock serviced head on my 73 .In my opinion his work is the standard by which all should be judged
 
Try and contact Ludwig here on this forum with a pm. He did a pretty neat repair on his commando head at the exhaust ports. He might give you some ideas if you don’t like shipping your head out. As stated already above, if you like to keep it the stock look, then Jim Comstock's work is top notch and I have seen first hand the repair he did to a buddy’s head.
Cheers,
Thomas
 
Don´t know if you´ve seen these pics of their work on the Norton exhaust, looks pretty good to me!
 

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CanukNortonNut said:
Try and contact Ludwig here on this forum with a pm. He did a pretty neat repair on his commando head at the exhaust ports. He might give you some ideas if you don’t like shipping your head out. As stated already above, if you like to keep it the stock look, then Jim Comstock's work is top notch and I have seen first hand the repair he did to a buddy’s head.
Cheers,
Thomas
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What side of the water is he, mine or yours? Don´t really see the point in shipping across the atlantic, too much money and customs and taxes and ....can´t do that.
 
He is south of the boarder from me. It is your head and you are just shipping it out for repair. I would inquire about that from customs in your country of Sweden to get an idea of what you would pay for the service repair work. The shipping you can inquire at DHL or your Currier of choice to get a ball park figure. If you have other issues like the tendency for the three studs being pulled out or spark plug hole stripped, decking the head, new valves and guides or head flow work , This can be done at extra cost for each machining step but the shipping will remain the same. That is something to chew on.
You can inquire here: http://www.hollandnortonworks.eu/en
if you want to keep it on your side of the pond. Shipping may be cheaper but you have to investigate what your country want you to pay for the repair bill when it comes back.
Good luck. Cheers,
Thomas
 
fiatfan said:
Don´t know if you´ve seen these pics of their work on the Norton exhaust, looks pretty good to me!
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I’ve no first hand experience but I did check those guys out a little while ago and I thought they looked good. I would happily use them for this job if it were me.
 
Seager Engineering repaired my 850 ports which were if anything worse than yours and did a superb job, absolutely no hesitation in recommending them, once done just tightened twice while hot and never came loose again.
 
CanukNortonNut said:
if you want to keep it on your side of the pond. Shipping may be cheaper but you have to investigate what your country want you to pay for the repair bill when it comes back.
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If sent to the UK then there shouldn't be any customs charges (at the moment) as Sweden is part of the EU.
 
Good Point Les,
I forgot about the EU thing. But what about the Brexit? Oh I just opened up a can of worms. :D :eek: But on another side note, in Canada we are exempt from duties on parts for vintage vehicles over 25years of age and older. We must instruct the vender to include this info like Andover Norton or others who sell or work on our parts when it comes through customs. We still have to pay our GST and PST (provincial sales tax) on the value of the parts or service but not duty. If he keeps it on his side of the pond then that is probably the most economical choice.
cheers,
Thomas
 
CanukNortonNut said:
But what about the Brexit?
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We're not there yet (if we ever will be?).

CanukNortonNut said:
We still have to pay our GST and PST (provincial sales tax) on the value of the parts or service but not duty. If he keeps it on his side of the pond then that is probably the most economical choice.
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The Swedish tax (VAT) rate appears to be 25% (standard rate) but if the work was carried out in the UK then the VAT would be charged at the UK rate (20%).

https://www.avalara.com/vatlive/en/vat-rates/european-vat-rates.html
 
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