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General Category => General Discussion => Topic started by: Canuck750 on August 01, 2022, 04:50:04 PM

Title: Eldorado / Ambassador exhaust port inserts
Post by: Canuck750 on August 01, 2022, 04:50:04 PM: Does anyone know where I can find head exhaust port repair kits, for the big header nut that threads into the head, these require milling out the damaged threads in the head and welding in the new threaded aluminum plugs.
I can’t find them on the usual suspects web sites.

A header pipe nut loosened on my Eldorado and the threads are ruined in a head, I know a welder who can weld the inserts for me. I could make some inserts but I would prefer to buy the inserts and not attempt a good inside thread cut with my very limited lathe skills.
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: Tom H on August 01, 2022, 05:57:19 PM: If you still have threads in the heads and the nut just won't tighten up, and you have the original brass nuts. You can take a socket or the like that is just slightly larger than the ID of the nut and hammer it in so that it expands a bit. A few tries and it might just solve your issue.

It can be done to other materiel nuts, just not as easy as the brass ones.

You might have to give the shops a call to see if they still have the inserts. I'm pretty sure MG carried them in the past.

Tom
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: Antietam Classic Cycle on August 01, 2022, 07:10:35 PM: You might check with Tom Hetrick @ 3R Restorations: https://3rrestorations.com/
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: Canuck750 on August 01, 2022, 08:25:16 PM: Quote from: Antietam Classic Cycle on August 01, 2022, 07:10:35 PM
You might check with Tom Hetrick @ 3R Restorations: https://3rrestorations.com/

Thanks Charlie
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: Turin on August 01, 2022, 08:59:24 PM: Tom's a good guy and won't steer you wrong.
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: mtiberio on August 02, 2022, 04:44:18 AM: What was the convenional wisdom back in the day? I think Norton header nuts and perhaps another brand (Ducati?) were the "first and second oversize" for the OEM Guzzi nuts.
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: Canuck750 on August 02, 2022, 10:22:39 PM: I contacted Tom in Phoenix today, he can make a new insert and weld it into the head for me. Goes in the mail tomorrow.
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: bigbikerrick on August 05, 2022, 05:26:26 PM: Hey Canuck 750, could you share the contact info. for the get. in Phx. that can do that type of repair?
Thanks
Rick.
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: Antietam Classic Cycle on August 05, 2022, 06:58:02 PM: Quote from: bigbikerrick on August 05, 2022, 05:26:26 PM
Hey Canuck 750, could you share the contact info. for the get. in Phx. that can do that type of repair?
Thanks
Rick.

From my post above: Tom Hetrick @ 3R Restorations: https://3rrestorations.com/
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: Kiwi_Roy on August 05, 2022, 07:45:19 PM: I went a different route with my old girl.
I installed a couple of 6mm rods to which I attach 3/16" J bolts that hold the stripped nuts in place.
Its been that way for a couple of years now.
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: bigbikerrick on August 05, 2022, 08:21:40 PM: Thank you, Charlie.
Rick.
Title: Re: Eldorado / Ambassador exhaust port inserts
Post by: moto-uno on August 06, 2022, 01:17:40 PM: I can vote for Roy's repair , seen it and had to look to notice it , nicely done . Peter