Finally got a chance to remove the timing cover on the el today. Rotating emgine with the cover off I noticed the aux shaft was binding slightly. Released the dizzy clamp and the shaft freed up. Took the shaft out and the damage to the cog was very bad. The teeth are so thin and worn that they are folding over slightly at the end. Luckily tho the surfaces of the shaft where it runs in the block show no damage at all. So it looks like it was caused by my aftermarket dizzy when the ford one failed. Had the shaft checked and measured by my engineer and he agrees that the motor will be fine with a new shaft. Just gonna check how the dizzy runs against it next time! Was very lucky I think!

When fitting those cheap dizzy's, I swap the original dizzy gear on to the new cheap one....I don't trust the cheapo units much.

It's actually the cogs position on the shaft that was the problem. It sits around 2 mm lower than the ford dizzy. I've fitted heaps of these dizzys to peoples cars in the past with no problems at all. But it has made me wary. In future if thats what I fit I'll be making a few measurements. After I suggest genuine tho.

this is what an aftermarkeet dizzy did to mine!!!

the one on the left is the dammaged one the one on the right shows how it should be lol...

 

 

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yep, i had an aftermarket dizzy once, it was a RAE brand one, and it broke the gear on the dizzy gear, it totally broke the gear in half.