[SCG] When did belt guards appear on 1964 Corvairs?

[larry at vairshop.com]

hi Bill
as a starting point check the assembly manual and see what date is  
listed for the guards. that doesn't mean they entered production then,  
but it would *not* have entered production *before* then. rear refers  
to one at idler pulley, and yes they are guides.

there may be a technical service bulletin that tells techs how to  
adjust these, and it may note when they came into production. i'll  
look when i get a chance, but it's not likely to be soon.
larry



  mQuoting William Hubbell <wjhubbell at gmail.com>:

> Do we know the approximate date when the top shroud and idler pulley  
> belt guards were added to the Corvair engine?  Also, do we know if  
> Early Air Conditioned cars used either of these guards?
>
> The guides definitely first appeared sometime in the 1964 model  
> year, as there are two top shroud part numbers listed in the March  
> 1, 1964 Corvair-Chevy-Chevelle parts catalog:
>
> - 3794216 Shroud Assembly, Upper, 62-63 Corvair, FC, 64 Corvair  
> (exc. Turbocharger) (1st design)
> - 3851838 Shroud Shroud Assembly, Upper, Corvair, FC (exc. Spyder)  
> (2nd design)
>
> There are likewise two part numbers for 64 Spyder top shroud:
>
> - 3848398 Shroud Assembly, Upper, 64 Corvair, Spyder (1st design)
> - 3851840 Shroud Assembly, Upper, 64 Spyder (2nd design)
>
> There is apparently only one listing for 64 FC:
>
> - 3848400 Shroud Assembly, Upper, 64 FC
>
> Additionally, the index listing for "Guide, Blower belt idler  
> pulley" points to section 1.060.  In that section I find the  
> following:
>
> - 3851844 Guide, front, 64 Corvair, FC (exc. Air Cond.)
> - 3851845 Guide, rear, 64 Corvair, FC
>
> I'm not sure if "guide" is the belt guard.  If so, is the "front"  
> the guide that goes on the upper shroud and "rear" the guide that  
> goes on the idler pulley?
>
> The parts book does not list the dates for "1st design" and "2nd  
> design" - do we have any idea when this change took place?   I  
> already looked in my Clark's reproduction Chevrolet Service  
> Bulletins and did not find anything, but as these are edited  
> reproductions I might be missing the announcement.
>
> Bill Hubbell



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