Re: 1940 110 oil filter insyallation

Posted by HH56 On 2018/10/15 19:35:45

Not sure but I think you plumbed it backwards.

Depends on the canister but I agree that with todays filter element the side inlet would seem to be better if the canister can do it. Packard had several variations to the plumbing and 2 different filter canisters prewar due to the lifter starving issue. Many if not all of the prewar canisters had the inlet at the bottom and outlet on the side.

First version filters with the bottom inlet and all lifter oil thru the filter would clog starving the lifters. They revised plumbing without much effect then went with the revised plumbing and a second version filter canister which had a blow off valve to bypass the filter if it clogged. Final version kept that second filter since it still entered at the bottom but also went to the bypass plumbing with the drilled hole to dump back into the crankcase. There were also different interval recommendations for changing the element.

Canister plumbing was reversed postwar to the inlet on the side and outlet at the bottom and they went back to the first version filter with no valve. I guess the blowoff valve wasn't needed when they revised things to use the large outer circumference of the filter element to collect dirt rather than clogging up the small narrow inner core. IMO, that is the better (but not correct) plumbing method for prewars too.