pourindiesel,

I think the tip retainers are 15mm.

I did mine about the same. I found some barstock to fit the bottom of the injector, clamped that in the vise and set each injector on that and got at it with a 15 mm socket from the top. realy easy to do.

Jason

 

My bad, its been a while since I did the last set.

 

Pourin,

Do you have a picture of the injector in your wood/cardboard holder?