Re: Oil Filter Plumbing 1940 356CI
Posted by HH56 On 2022/11/29 13:48:22
The new hole looks to have been drilled and plugged with an ordinary slotted head pipe plug. To use it that plug would be removed and if the hole is already threaded properly a 1/8" NPT to 1/4" inverted flare tube adapter to take the tubing would thread back in the hole. That would be one of the 6659 parts. The other would go in the upper block port going to the lifter gallery.
In this Service Letter which has the same illustration you posted the paragraph below the illustration mentions the restriction as being a hole with dimension of 5/64". Another bulletin I believe issued later during the war had dealers check for the restriction and if not found obtain a fitting, fill the port opening with solder and then drill that specific size hole in the solder. At some point rather than have the restriction in a fitting the canister itself was changed to include the restriction in the center pipe. Whether you need to add a restriction would depend on the canister you have.
The kit pipes are the labeled tube shown in the diagram and the tube adapter to block fittings are ordinary brass fittings some of which are available today. The original plumbing had the filter fed almost like the new version but only had a single tee. The filter return was to the upper port going to the lifters so the second tee was not needed. Changing the plumbing required the kit with a new tube and tee for the direct oil supply to the upper lifter gallery port. I suspect the new return route to the drilled hole in the block used the old return tube that was rebent for the new location.
Here is specs given in the parts Utility section for the 6659 tubing adapter. The tee is a different story. With one port being a 1/8 NPT male nipple, that may have been special or at least not as easily found today. You may need to get two regular tees with the ends threaded 1/8 NPT female and the center side port being for 1/4" inverted flare tubing. Use a 1/8" close nipple to connect the first tee to the block and a second close nipple to connect the two tees together to duplicate the drawing. At one time Max Merritt supplied that setup but I don't know if that is still the case. Most decent hardware and some auto parts stores should be able to come up with the adapters, nipples, and tees. On later versions of the plumbing the need for a second tee was eliminated and Packard used a special square 4 port brass block to replace the tees.
Attach file:
fitting.jpg (141.65 KB)
In this Service Letter which has the same illustration you posted the paragraph below the illustration mentions the restriction as being a hole with dimension of 5/64". Another bulletin I believe issued later during the war had dealers check for the restriction and if not found obtain a fitting, fill the port opening with solder and then drill that specific size hole in the solder. At some point rather than have the restriction in a fitting the canister itself was changed to include the restriction in the center pipe. Whether you need to add a restriction would depend on the canister you have.
The kit pipes are the labeled tube shown in the diagram and the tube adapter to block fittings are ordinary brass fittings some of which are available today. The original plumbing had the filter fed almost like the new version but only had a single tee. The filter return was to the upper port going to the lifters so the second tee was not needed. Changing the plumbing required the kit with a new tube and tee for the direct oil supply to the upper lifter gallery port. I suspect the new return route to the drilled hole in the block used the old return tube that was rebent for the new location.
Here is specs given in the parts Utility section for the 6659 tubing adapter. The tee is a different story. With one port being a 1/8 NPT male nipple, that may have been special or at least not as easily found today. You may need to get two regular tees with the ends threaded 1/8 NPT female and the center side port being for 1/4" inverted flare tubing. Use a 1/8" close nipple to connect the first tee to the block and a second close nipple to connect the two tees together to duplicate the drawing. At one time Max Merritt supplied that setup but I don't know if that is still the case. Most decent hardware and some auto parts stores should be able to come up with the adapters, nipples, and tees. On later versions of the plumbing the need for a second tee was eliminated and Packard used a special square 4 port brass block to replace the tees.
Attach file:
fitting.jpg (141.65 KB)
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