Lubricating System Replacement Procedures - Dodge D250 1990 Service Manual

Engine Lubricating System
Page 9B-16
Base Engine Components
DODGE Turbo Diesel
Fill the engine with the correct grade of new oil. The engine
capacity is 10.4 liters [11 U.S. quarts] in the crankcase and .95
liter [1 U.S. quart] in the lubricating oil filter.
^ Lubricating System Replacement Procedures
Oil Pressure Regulator Valve and/or Spring -
Replacement
19mm
Remove the threaded plug, gasket, spring and valve.