Re: The Duchess Project: 1940 Super 8 Convertible Sedan

Posted by BH On 2010/12/28 22:10:34

First let me say that I don't know jack squat about prewar Packards, but that diagram from the MOTOR manual sure caught my eye. In looking over Packardinfo's collection of Packard Service Letters and Counselors (in preparation for compiling content for a 1941-47 Clipper Service Index), I found that same basic diagram in three articles:

1) SL Vol. 15, No. 12 , in an article on noisy tappets in the 18th-19th Series Super 8, which advises of retrofit to new plumbing as used on 20th Series. I suspect the diagram and text from this article is what the MOTOR manual used.

2) SL Vol. 15, No. 19, in an article that revisits the subject of noisy tappets in the 18th-19th Series Super 8, which adds a precaution regarding the filter outlet elbow restriction/orifice.

3) SL Vol. 17, No. 16, in an article on hydraulic tappets in the Super 8, which reviews the oil delivery of the 18th-19th Series, as originally produced, versus the 20th Series and reiterates the retrofit and proper dimension for the filter restriction.

Hope these additional articles provide some further insight.