Dodge D250 1990 - Lubricating Oil Pressure too High

Troubleshooting Logic
Page9A-28
Base Engine Components
DODGE Turbo Diesel
Lubricating Oil Pressure Too High
Cause
Correction
Malfunctioning Pressure Switch/Gage
Verify the Pressure Switch is
Functioning Correctly.
OK
t
Engine Running Too Cold Refer to Troubleshooting Logic for
Coolant Temperature Below Normal.
OK
t
Oil Viscosity Too Thick
Make Sure the Correct Oil is Being
Used. Refer to Lubrication and
Maintenance Section.
OK
*
Oil Pressure Regulator Valve Stuck Check/Replace Valve, and/or Oil
Closed or Binding
Cooler Cover.