Re: Does replacing distributor O-ring require re-timing?

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Old 01 Aug 2005, 10:42 am   #1 (permalink)
timbirr@mailcity.com
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Default Re: Does replacing distributor O-ring require re-timing?

I don't know. If you get no answer here, possibly try a Haynes or
Chilton Manual at your local library.

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Old 03 Aug 2005, 11:36 pm   #2 (permalink)
Ladd
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Default Re: Re: Does replacing distributor O-ring require re-timing?

"timbirr" wrote:
>I donít know. If you get no answer here, possibly try a Haynes
>or
>Chilton Manual at your local library.

Thanks for the tip and taking the time to pass it on.

I have the factory service manual and the section about the
distributor details removal, complete dissassembly to the
distributorís component parts, reassembly and reinstallation whereby
re-timing the ignition system is required. That makes sense to me as
you have changed/altered/rotated/boogered everything concerned. If one
is just pulling the distributor, changing the o-ring and putting the
unit right back in having carefully not rotated anything, I can see
the possibility that the timing will have been unchanged. Or at least
changed so little that the computer can make the appropriate
adjustments.

Perhaps the Haynes or Chilton manual will address the differences
between a simple remove/replace and and complete rebuild.

Ladd

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Old 04 Aug 2005, 03:01 pm   #3 (permalink)
timbirr@mailcity.com
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Default Re: Does replacing distributor O-ring require re-timing?

The Haynes and Chiltons tend to (not always) address some of the things
that the factory manual assumes you should know already. Good luck.

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Old 05 Aug 2005, 05:10 pm   #4 (permalink)
Daniel
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Default Re: Does replacing distributor O-ring require re-timing?

somehow my prior reply didn't appear.

Obviously the distributor shaft has to be in the correct position, but
the distributor housing also has to go back in the identical same
orientation because it houses the pickup coils in relation to the
trigger on the shaft.
In theory, if you can reinsert the distributor exactly as removed,
timing will not change.
I tried scribing with an awl, and also indexing with a paint mark but
due to parallax error and not being able to realign exactly, wound up
resetting the timing anyway.
Not hard to do.
The Haynes manual will tell you which two pins to jump with a paper
clip in the diagnostic port under the hood. The "check engine" warning
light on the dash will flash, and then you can manually set the timing
with a light, having disabled the computer timing advance.
Mine was 10 deg. BTDC
This should be too obvious to state, but, to adjust the timing, you
loosen the hold down bolt and rotate the distributor housing slightly.
(against the direction of rotation to advance, with the direction of
rotation to retard - that part hasn't changed since 1950.)

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