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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: XJ-S V12 Archeology (Distributor Questions)
Special Interest Car Parts carries the distributor rebuild kit. Aaron '85 XJ-S >---------- >From: Michael Neal[SMTP:mneal@wco.com] >Sent: Tuesday, February 11, 1997 3:32 PM >To: John Napoli; Jag List >Subject: Re: XJ-S V12 Archeology (Distributor Questions) > > >At 02:58 PM 2/11/97 -0500, John Napoli wrote: >> >>As the result of other work I'm doing on my car (an 82 XJ-S HE) I pulled >>my distributor apart. I tested the centrifugal advance (free and moving >>properly -- hooray!) and the vacuum advance. >> >>The vacuum advance is dead. Applying vacuum to the diaphragm results in >>no movement; in fact, the unit will not hold any vacuum at all. The >>vacuum advance on the distributor from my donor engine behaves the same >>way, so I guess they are both shot. >> >>Questions: >> >>1. Is it common for the vacuum advance units to fail? I've got two, and >>they're both dead. > >With the high underhood temps they fail quite regularly. Note that the new >replacement units don't hold vacuum, they bleed down slowly. > >> >>2. Are the vacuum advances rebuilable? >> >Not that I've seen. > > >>3. If not, what is a good (inexpensive) source for a replacement? > >Any good Jag parts specialist. > >> >>4. Is there an interchange from another distributer? Either direct >>bolt-on (I mean pin-on) or by adapting? > >I don't think that it would be worth messing with. > >> >>5. If no one knows of an interchange, what are the specs for the stock >>vacuum advance to help me in finding an alternative? >> > >>6. On some V12s, the vacuum advance covers the front right throttle stand >>bolt. Does this mean that the distributor was not installed 'properly' >>(ie, according to M. Neal's directions in Kirby's book)? > >With proper adjustment it should not ever cover this. The instructions I >wrote work great for me every time. I didn't even have to adjust the >timing on half of the ones I've done. > >> >>7. I happened to be at my local Jag dealer and enquired about the price >>of the 'Distributor Service Kit' mentioned in Kirby's book. Of course, >>the parts guy never heard of it. He would sell me each piece separately, >>though (the distributor o-ring alone is over $8.00 US). And of course, >>none of it was in stock. ANyone know of a good mail order source for this >>kit? >> > >I remember someone posting a source for this, I need the shaft seal for my >spare distributor. Does anyone remember the source? > > >>The reason for question 4 is that if these things commonly quit, I would >>prefer to fit a unit from another car that was less expensive, more >>dependable, or both. >> > >One rebuild should last for quite a long time. A cool retrofit would be to >use the distributorless system from the later 12 cyl. I believe it was >used on the 6.0 and used two coils with six plug towers on each. I think >it was Marelli but I haven't seen one of these systems in the flesh yet. > > >>John > > >> >> >> >
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