Re: 1940 Custom Low Compression

Posted by John Sauser On 2014/5/28 15:24:00

I believe that your oil filter is plumbed wrong. The inlet to the filter is the outside top fitting and the outlet is the center bottom fitting. Filter elements are made to flow from the outside to the inside.

Packard made a change to the plumbing to address noisy lifters, my 47 and 48 356's have this change and I think I have seen it in a service bulliten. There is a tee fitting on the block that comes from the pump, one leg goes to the filter the other goes to the block input to the lifter galley. Oil to the lifters does not go thru the filter so as to provide adaquit flow and pressure to the lifters.

John