CCooper Posted February 4, 2016 Report Share Posted February 4, 2016 I've owned a '48 Plymouth Sedan (with '49 engine) for 42 years. Paid $25 for the car. I did some work on the car recently and didn't take pictures before I started. Now I'm having a senior moment and I'm not sure of the oil line routing. Where is the best place to find oil line routing diagram. I have searched online for some time and cannot find it yet. Thanks, CCooper Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted February 4, 2016 Report Share Posted February 4, 2016 I will take a guess that you are looking for the oil filter supply and return lines. Not all oil filters are the same so you must know where the filter inlet is and where the filter exit is. The picture below shows where the filter lines connect to the engine. 1 Quote Link to comment Share on other sites More sharing options...
Reze Posted February 5, 2016 Report Share Posted February 5, 2016 the oil filter supply and return lines can be different. Quote Link to comment Share on other sites More sharing options...
_shel_ny Posted February 5, 2016 Report Share Posted February 5, 2016 (edited) To add to what Don has said, here is a pic of the engine. As a point of reference: The blue arrow points to the dipstick. The red arrow points to the supply (pressure) The green arrow points to the return (directly above the pressure relief valve and spring) Another point of reference: The yellow arrow is pointing to the starter. And as Don said, not all filter canisters are the same. Look for inlet marking on it. I believe that most returns were from the bottom, with the input high on the side, but there are oddities. My understanding is that this was a dealer install/option, or later install, so there were different canisters used. You could post a pic of the canister if in doubt, and possibly get some relevant answers. Edited February 5, 2016 by shel_ny 1 Quote Link to comment Share on other sites More sharing options...
CCooper Posted February 5, 2016 Author Report Share Posted February 5, 2016 Big help folks! All the information is very helpful. It looks to me that the oil pressure line to the instrument panel connects at the rear of the engine. Any picture by any chance? Thanks, CCooper Quote Link to comment Share on other sites More sharing options...
janan5243 Posted February 5, 2016 Report Share Posted February 5, 2016 It's shown in the picture that Don posted. 1 Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted February 5, 2016 Report Share Posted February 5, 2016 Big help folks! All the information is very helpful. It looks to me that the oil pressure line to the instrument panel connects at the rear of the engine. Any picture by any chance? Thanks, CCooper See posting #2 Quote Link to comment Share on other sites More sharing options...
_shel_ny Posted February 6, 2016 Report Share Posted February 6, 2016 (edited) This "pic" shows the connection ( line, and flex hose) as indicated in Don's "diagram". Connection is at the same height as the pressure to the filter. There are 4, or 5 plugs located at that height between the front and back of the engine. The rear one is likely the most convenient for connecting the gauge, but you could actually connect to any of those. Edited February 9, 2016 by shel_ny Quote Link to comment Share on other sites More sharing options...
48ply1stcar Posted February 7, 2016 Report Share Posted February 7, 2016 Here's a picture of my engine with the oil gauge line circled. I have an adapter on mine so I could monitor the oil pressure while working on the engine. Quote Link to comment Share on other sites More sharing options...
Solution CCooper Posted February 8, 2016 Author Solution Report Share Posted February 8, 2016 Folks, I really appreciate the help. I believe I have it now due to your help. Thanks, CCooper Quote Link to comment Share on other sites More sharing options...
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