According to Gerry Myers, “this picture of this experamental V5 Diesel Engine..made by Oldsmobile Of course in 1983..produced 70HP @ 4000RPM and 111Ft. Lbs @ 2400 RPM..If you look at it, The Injection pump is where the “missing” cylinder is. It appears to have the same injectors as the 4.3 V6 and 5.7 V8 Diesel. Notice the head bolt pattern, Appears like the 4.3 V6, except ALL of the bolts are the same size. The engine has glow plugs, and am sure that the combustion chamber, prechamber, and piston designs are all “Olds Diesel Technology”.
This engine is currently on display at The RE Olds Museum located in Lansing, Michigan.