All Corvair engines produced after November 29, 1963 were equipped with Blower Belt Guides, as noted in Technical Service Bulletin #982, dated March 18, 1962.
This TSB also gives instructions for adding blower belt guides to earlier engines (1961-64).
Thanks to Dave Newell for providing scans of this TSB.
![](http://stock.corvair.org/wordpress/wp-content/uploads/2023/04/1964-TSB-982-01-774x1024.jpeg)
![](http://stock.corvair.org/wordpress/wp-content/uploads/2023/04/1964-TSB-982-02-805x1024.jpeg)
![](http://stock.corvair.org/wordpress/wp-content/uploads/2023/04/1964-TSB-982-03-791x1024.jpeg)
![](http://stock.corvair.org/wordpress/wp-content/uploads/2023/04/1964-TSB-982-04-788x1024.jpeg)
![](http://stock.corvair.org/wordpress/wp-content/uploads/2023/04/1964-TSB-982-05-808x1024.jpeg)