[Vwdiesel] TD Injection Pump locking hole

[Milton Kaplan]

I recently had an 86 1.6TD Jetta installed in my Caddy. Will be
installing cruise control and tachometer based on Roger Browns pages
using a face plate glued on the sprocket. I need to make holes in face
plate first before gluing in, to allow insertion of pump locking tool for
later maintenance. There are all different size holes in this sprocket.
Some have advised using a 7/16 Craftsman deep 1/4 inch socket as locking
pin.  Does someone know the actual pin size, closest SAE? I have a 1/4
inch deep socket not craftsman. Its 21/32 and slightly too big to fit the
smallest hole in the sprocket. There is just one small hole in the
sprocket. Does this sound like the correct hole? Why only one small hole?
The other holes in the sprocket are much bigger. Although I didn't see
the inside alignment hole on the pump, I assume it is hidden by the
current sprocket position. Or am I looking at the wrong hole for locking
in the sprocket for the Jetta TD pump?

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