Greetings All.
Wife's Cooper's running a bit rough. Looked at plugs and Dissy cap. The spring carbon bit that takes the coil to top of rotor button looks like its flattened out and burnt. Never seen one like this?
Is this normal?
Alex.

You can buy them new

I got some at a swap for a $1 each

Mini kingdom online has them in the mini king parts book give john a call if ya stuck or just get a new cap if it aint a 29d dissy cap

Thanks for reply.
Will buy a new one. I was interested if there were any reasons it wore down fairly fast. I'm sure its not that old. I have a electronic points fitted.
The timing wouldn't effect it would it?

New one tomorrow.

Cheers
Alex.

Make sure the carbon contact where it sits on the rotor button is smooth and no groves as it spins on this if its groved or anything like that will act as a knife and cut the carbon button to bits

If you haven't already bought one PM me your name and address and I'll post one over (assuming it's the same as in the picture).

_________________
ex-NSW Police 1970 MK II Cooper S
VMCI #43

Winabbey.

Thanks for the response. (And others)
I checked several old caps to rob a good contact out of.
They are all smaller. The one that's damaged is 5.88mm diameter.

I went and bought a new cap today at MiniSport. It wasn't a cost issue, it was simply that the cap has only done maybe a couple thousand K's and I thought I could resurrect it.


Thanks for the offer, but all's good.


I polished up the rotor and put it back together. Certainly running better.

Thanks All.
Alex.

The burning will be from a gap between the rotor button and the cap. It may be that the contact had worn down and allowed a gap to open up, it also may have pushed up and jammed in place from dust. The spark will then jump the gap to the rotor button, just as it would in the gap between the button and the four dizzy cap contacts.

Make sure the top of the button is nice and smooth and polished so it doesn't file away the contact.

_________________
SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

Thanks Mick
That makes sense. I thought it might be the timing at first. As above, I polished the rotor and its running spot on.
Too make things worse,I reversed into my 850 last night. Dam! Took off the bumper and carefully tapped it out. Small bruise, but 95% fixed. I had a reverse camera, but was watching the side clearance. Ha!

Cheers
Alex.