67 non-S Bosch Distributor Rotor?

[68S_SK2]

NOS Bosch 1234332159 for sale on ebay, no affiliation:

https://www.ebay.com/itm/293070540992

Claudius

[gyoza]

Thank you to all who are weighing in - it’s helpful and we’re working through things.

We may be narrowing it to a bad coil but this 911 also has a very early Permatune module and we want to make sure we get a properly compatible coil. Contacting Permatune today.

@edmayo - rotor is suspect simply given it’s age. I mean…i’m the same age and I’m certainly suspect. we’re getting no spark and it’s in line.

@SIMI BOB - thank you for the continuity confirmation. I’d happily try a rotor without the limiter if I can source one.

@68S_SK2 - Claudius - this is great information. I’m helping the original owner work though this and since i’m a “914 guy” much is familiar but specifics like this are fantastic - and yes - just saw the ebay listing as well. I think like-for-like is the way to go. Even if it proves not to be the issue, having a backup of a hard-to-find piece isn't all bad.

@911MRP - yours may be very close - still researching.

[911MRP]

If I were the owner I’d probably buy the nos like for like one especially if the car is a keeper. Not making any more in the old way still in its factory box probably worth having one tucked away even if that part turns out not actually the culprit.

I have long kept Bosch bag of spares correct for my 73 car. Since car had original tool kit and an original travel kit (with MFI and 2.7 parts) the contents of the bag complemented and add to those factory kits. Never needed it mercifully but it was a comfort to have especially when the 911 was more or less my daily driver used to take the kids to school when they were young, for occasional shopping trips and to go to work. Also quite a natty yellow Bosch design bag dating from the 70s. The Bosch slogan on it kind of followed my thinking on having theses things all together but in a different way than the marketeers meant it originally



There is a nos rotor among the things but it must been left in the bottom of the bag during photo.

Steve

[gyoza]

Steve - totally agree and that's what I did. Went with the eBay like-for-like and worst case, I'll have a long-term, close to NLA spare.
Have word out to Permatune to see what coil they suggest is the modern unit to work with their box that's installed - although it's been taken out of line in order to troubleshoot.

[edmayo]

An ohm meter will tell you if the rotor is bad or not, regardless of its age.

[gyoza]

Hi Ed - an ohm meter across which two points?

[edmayo]

From the center to the tip. Use a little scotch -brite on the center contact and a small file to clean the tip. You're going thru the resistor which is what would be likely to go bad. I'd expect a resistance of about 5000 ohms. If the rotor does test to be bad then of course find a replacement. My point was since you indicated you couldn't easily find one, and your old one is good, move on to finding what your problem of no spark is.

[gyoza]

Thanks, Ed - that's very helpful. I do have the NOS one from eBay heading our way but I'll get a meter on the one in hand.
(by the way - this is Joe Rusz's car - I think he may have called and left you a message....)

[Jon B]

An ohm meter will tell you if the rotor is bad or not, regardless of its age.

Hi Ed - an ohm meter across which two points?

From the center to the tip. Use a little scotch -brite on the center contact and a small file to clean the tip. You're going thru the resistor which is what would be likely to go bad.
I'd expect a resistance of about 5000 ohms...

Example:



Jon B.
Vista, CA

[gyoza]

Well - thanks for this and it's interesting as it appears to bench test fine.