Re-threading a stipped thread in Dynamo Mount - Part 1

[gtt1951]

My Low-light is giving me problems at every turn.
The dynamo that it came with was a later C40 version with the wrong size pulley.
It was also not mounted in a way that lined up with teh adjuster bracket, so I had to take it off whilst I decided what to do.
I decided, in the end to refit the one it came with, pending getting something better - but more problems, the front mount thread was knackered.

SideValve Dynamo mount with stripped thread.jpg (714.14 KiB) Viewed 1213 times

I forgot to take a picture of the drilling operation - sorry.
I had to pull the waterpump pulley and fan blades off to give me extra clearance for the Tap handle, this still wasn't enough

tap in use.jpg (591.54 KiB) Viewed 1213 times

as the smallest tap Handle I had, that could take this size of tap, was still too long and was snagging on the water pump (could only do about a quarter turn at a time and then refit the handle each time (very time consuming).
New thread cut

new thread cut.jpg (853.63 KiB) Viewed 1213 times

M8 Fine V-coil kit, as bought

IMG_20190416_180519.jpg (2.05 MiB) Viewed 1213 times

V-coil about to be inserted with special tool

IMG_20190416_180739.jpg (1.22 MiB) Viewed 1213 times

Insertion time - see part 2