Re: 1940 Custom Oil Canister and Low Compression

Posted by Owen_Dyneto On 2014/8/22 9:10:12

Just reading thru JD's good explanation and commentary above, I'm wondering if some folks not that familiar with Packard oiling systems might not get confused by the terminology "by-pass" and full-flow" oil filtration. JD's explanation refers to how they are installed. The more traditional use of these names refers to the type of filter installation; "full-flow" meaning 100% of the oil leaving the pump is filtered before it enters the oil galleys and this type of filter was last used by Packard in 1939 on the Super Eight and Twelve. All subsequent Packard filters were of the by-pass type meaning only a portion of the oil leaving the pump passes thru the filter.