Where to find rebuilt 3b Distributor

Bernie Benz b.benz at charter.net
Wed Feb 11 07:39:31 PST 2009

Surprise! Bosch still has new and rebuilt dist, as well as caps and  
rotors listed on their web site.
The dist. part numbers are not quite the same for the 3B and 7A but  
the rotors are! Probably the wide tipped one.
I’ve run them interchangeably in either engine.

The 10V I5s can run with sloppy TBs but the added inertia of the  
additional two cams lowers the torsional resonant frequency and  
increases the amplitude of the cam drive system‘s critical frequency,  
further loading the chain and dist. drive gear with anything less  
than a very tight belt.

FYI, I’ll fwd my dist. alignment instructions.


On Feb 10, 2009, at 10:36 PM, Ezekiel Brown wrote:

> Thanks for the quick response, maybe I should explain my reasoning  
> behind preventive maintenance some more. Surprisingly enough this  
> is the newest car I have ever owned and I purchased it to drive  
> places with. The end of this month I am going to be driving it to  
> Colorado and back which will be a little over 3000 miles round  
> trip. Later this spring I plan to go up to Alaska and back so you  
> can see how I would rather not have some silly very rare part like  
> the distributor drive gear failing on me in the middle of nowhere.
> As for tightening the TB, I was lead to believe that the drive gear  
> failed simply due to it being plastic and aging, it is 17 years old  
> now. Could you explain further?
> I have always thought of distributor caps as a maintenance item  
> that should be replaced or at least cleaned of corrosion kind of  
> like any other part of the ignition system i.e spark plugs.
> The only difference with the 7A rotors is the width and I can just  
> file it down? Well I guess that is a good idea. My engine does have  
> a Intended acceleration stage III+ chip and I have noticed a  
> stumble in high load high boost runs which I have been lead to  
> believe could be this rotor issue.
> Good Idea on the 7A distributor, autohaus does have those. Those  
> are the same except the rotor correct?
> Thanks,
> -Ezekiel
> On Tue, Feb 10, 2009 at 7:59 AM, Bernie Benz <b.benz at charter.net>  
> wrote:
> If the plastic gear is OK, use it. Just keep your TB tight.
> Why do you need a new cap? I have never replaced one.
> 7A rotors are easily modified with a file, but not necessary if  
> engine is running stock and dist timing is correct.
> I can send my timing procedure.
> Also, Look for a 7A distributor.
> Bernie
> On Feb 9, 2009, at 11:26 PM, Ezekiel Brown wrote:
> I was looking though my service records and realized that my car  
> has the
> wrong rotor so I figured might as well replace the darn plastic  
> drive gear
> before it fails. Autohaus used to have rebuilt distributors for 199$.
> However, I checked with them and they said that after checking with  
> several
> of their direct importers the part is now on back order with no  
> expected
> delivery date. It seems the only place that has rebuilt  
> distributors is
> 034Motorsports but they want 325$ and another 20$ for the correct  
> rotor. 034
> also has brass drive gears for 95$ but by the time I get a cap and  
> a rotor
> it seems that I should almost be able to get a whole rebuilt  
> distributor.
> Long story short does any one know of another source for a rebuilt
> distributor?
> Thanks
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