Re: [xj-s] distrib. o/h my exper.

[sean.straw+Jaguar@mail.professional.org (Sean Straw)]

At 11:30 02-07-98 -0700, Jim Moore wrote:

>Now the second thing that I'd like to have seen in the book and that is
>about setting up the timing. OK, it's done at 3k, but to what reading with
>a strobe underneath. (That's a trip, engine at 3k you under this thing with
>a strobe light!!!!)

I have an inductance lamp (if you have the old inline conductor style, time
to get a replacement).  I feed the inductance lead up the driver side of
the engine compartment and clip it to the #1 spark lead.  Clip the ground
lead to a decent ground point (the bolt on one of the tow rings seems to
work well), and put the hot lead on the output of the alternator (the
bottommost pin).  The automobile should of course already be jacked and ON
STANDS (BTW, I have a couple of short wood blocks with a large hole drilled
in them so the weight doesn't rest squarely on the pins on the jacking
points).

Ensure your timing plate is nice and clean and readable.  Same goes for the
mark (DAMN, I should have remembered to get in there with a wire brush
while I had the belts out).  A daub of liquid paper should do a nice job of
it.

>My numbers (Calif) are:
>w/o vacuum attached.
>750 rpm	0
>2000		10
>3000		22

Dunno about the first two numbers, but the 3K number is 4 degrees TOO
advanced.  Aren't you getting knocking on this for-crap CA gas?

Q: Does the smog inspector just run the numbers and peer under the hood, or
do you at least get to watch him have to deal with measuring the timing
(something they used to check with my GS)?

>So before I take the distributor off for the third time (all due to the
>mystery of the heavy spring), what's the thinking here?

I think the general consensus is that all the people here have experienced
that the heavy spring seems loose.  My belief at this point is that it is
probably a travel restrictor and not an active spring.  Yea, I'm puzzled as
to why they'd have different springs on it if the nylon stopwasher at the
base of the rotor shaft is sufficient to stop the rotation.  When I had
mine disassembled, it hadn't occurred to me to measure the travel WITHOUT
the nylon stopwasher.  Perhaps the action of that spring would be noticed
then?

---                             <http://jaguar.professional.org/>
Sean Straw                      '88 Jaguar XJSC 5.3L V12
Marin County, California        '69 Buick GranSport 455 V8

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