<VV> Timing adjustments

[corvairs]

I'm not sure how GM reconciled the fact that each casting with a 
different timing number has the same part number. There are, of course, 
a number of rear castings with different timing marks. How many 
different part numbers are there - or are they ALL the same part number? 
And if you ordered that part number  from a dealer which one would you 
get? Obviously the 0-18 casting, as it would work with any of the others 
(ex the turbo of course). Thinking about it I'm sure that it was never 
an issue because the 0-16, 0-12, 0-8 etc castings would have never been  
offered for sale in the parts department. A little awkward but just one 
of those things.  Lon

www.corvairunderground.com


Helt at aol.com wrote:
> In a message dated 6/22/08 3:17:59 PM Pacific Daylight Time, 
> contactsmu at sbcglobal.net writes:
>
>   
>> Only the rear covers from the 60-63 stop at the 16 degree mark. - Jim  
>> Davis
>>
>> Guess what?   I have a 60-63 rear cover.  I cleaned it and it only  
>> goes to 16 - no if, ands, or buts. 
>>     
>
> While just messing around in my shop yesterday, I came across two loose rear 
> engine housings in a box. Thinking that I would relocate them I accidentally 
> looked at their timing scales. To my surprise, cast right into the housing was 
> a 0 to 16 on one housing and also cast in the other was a 0 to 18 scale. 
> Further checking of some engines identified several with the 0 to 18 scale. These 
> must have been all for 140 hp engines although I can't prove it. Also of 
> interest is the fact that both types have a 3817672 number cast in them. That means 
> we have two different castings both using the same part number. Thus the 0 to 
> 18 must be a revised version.
>
> Of course we know the turbo engines all used a rivited-on timing scale of 0 
> to 20 with 0 to 24 being obtained by going to the end of the attached piece.
>
> Regards,
> Bob Helt
>
>
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