Pertronix ignition, rotor arm problem.

[trunt]

As per this video:-

https://www.youtube.com/watch?v=Cxxy4q0N11Q

I have a problem with the rotor arm fouling the distributor cover due to it sitting a little higher. its at 6mins:30s on that video

Anyone got a part number of the shorter rotor he shows in the video??

Terry

[KOY 23]

Never had that problem. Are you using the right kit as there are two, depending if your dizzy has single or twin points.

[trunt]

Never had that problem. Are you using the right kit as there are two, depending if your dizzy has single or twin points.

Pertronix LM181A

I have the twin points but it actually replaces the old plate anyways so not sure if that's a factor.

It's pretty obvious that the plastic piece you slip over the cam raises the rotor arm just a little, and if it was in the car it would be difficult to detect, it's only just rubbing enough to make it feel a little stiff but rotates.

[Staggard]

I had this, the plastic shroud that the goes over the cams had a casting burr and it did not push all the way down so not allowing the rotor to go down. I just filed off the burr and all was fine.

[trunt]

I had this, the plastic shroud that the goes over the cams had a casting burr and it did not push all the way down so not allowing the rotor to go down. I just filed off the burr and all was fine.

No its going fully down, we are talking about 1-2 mm here, Its not binding it tight but you can feel the friction. It must be really tight fit even without the shroud. Both of the parts I have are Lucas Originals, I could shave a mm off the bottom of the rotor and it would be fine. I may end up doing that.

[KOY 23]

Pertronix LM181A

I have the twin points but it actually replaces the old plate anyways so not sure if that's a factor.

It's pretty obvious that the plastic piece you slip over the cam raises the rotor arm just a little, and if it was in the car it would be difficult to detect, it's only just rubbing enough to make it feel a little stiff but rotates.

I'm sure mine was a LU187, anyway quick fix is a file.

[Staggard]

No its going fully down, we are talking about 1-2 mm here, Its not binding it tight but you can feel the friction. It must be really tight fit even without the shroud. Both of the parts I have are Lucas Originals, I could shave a mm off the bottom of the rotor and it would be fine. I may end up doing that.

You should not have to alter the rotor arm. make sure that the shroud ( for the want of a better name) is going fully down.