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Re-threading a stipped thread in Dynamo Mount - Part 2
Posted: Mon Apr 29, 2019 7:39 pm
by gtt1951
Insertion time
- IMG_20190416_180806.jpg (1.56 MiB) Viewed 1722 times
Next, V-coil in place
- V-coil in place.jpg (589.76 KiB) Viewed 1722 times
Unfortunately, the adjustable coil collar slipped along the tool shaft and I inserted the v-coui deeper than the 1 turn suggested.
You can't back them out as the coils are only "one-way".
Snap-ff tool in use to snap off the V-coil key
- snap-off tool.jpg (850.78 KiB) Viewed 1722 times
Dynamo back in place with a suitable number of spacer washers placed between the side bracket and the dynamo bolt lug.
- Dynamo remonted.jpg (643.22 KiB) Viewed 1722 times
Hope this will be of help to others.
George.
Re: Re-threading a stipped thread in Dynamo Mount - Part 2
Posted: Tue Apr 30, 2019 8:26 pm
by RobThomas
Just need the right profile pulley and you're sorted. Any luck? Ford one MIGHT fit.
Re: Re-threading a stipped thread in Dynamo Mount - Part 2
Posted: Tue Apr 30, 2019 10:49 pm
by alanworland
That does a great repair! Never understood why the MM used such a wide belt, not as though the dynamo generates 5kw!
Alan
Re: Re-threading a stipped thread in Dynamo Mount - Part 2
Posted: Wed May 01, 2019 6:58 am
by philthehill
In an ideal world all internal threads in alloy should be fitted with Helicoils, makes the thread much more resilient.
Re: Re-threading a stipped thread in Dynamo Mount - Part 2
Posted: Wed May 01, 2019 9:20 am
by smithskids
I was lucky, my water jacket/ dynamo bracket is cast iron, it was on the car when I bought it in 1970.
Re: Re-threading a stipped thread in Dynamo Mount - Part 2
Posted: Wed May 01, 2019 12:54 pm
by gtt1951
RobThomas wrote: ↑Tue Apr 30, 2019 8:26 pm
Just need the right profile pulley and you're sorted. Any luck? Ford one MIGHT fit.
So far I got one response from a member in Australia, but he hasn't yet sent me the photos.
Re: Re-threading a stipped thread in Dynamo Mount - Part 2
Posted: Wed May 01, 2019 1:08 pm
by gtt1951
smithskids wrote: ↑Wed May 01, 2019 9:20 am
I was lucky, my water jacket/ dynamo bracket is cast iron, it was on the car when I bought it in 1970.
The "other" green low-light, that was on eBay, had the cast iron dynamo mount - was yours like this
- Dynamo Mount.jpg (142.17 KiB) Viewed 1646 times
I did buy a spare alloy one, from ESM, to replace the poor-condition one on my high-light, but it turns out that the fabricator has cut 5/16" UNF threads instead of M8x1 fine.
Re: Re-threading a stipped thread in Dynamo Mount - Part 2
Posted: Wed May 01, 2019 5:34 pm
by RobThomas
That's a USHM2 engine with the bracket cast into the head. Your engine is from a much later (non-Lowlight) car. The BMC President tractor and the Vedette boat engine had iron side castings on the later block.