Dodge D350 1990 - Coolant Temperature below Normal

Base Engine Components
DODGE Turbo Diesel
Troubleshooting Logic
Page 9A-23
Coolant Temperature Below Normal
Cause
Correction
Too Much Air Flow Across the Radiator
Check/Repair Viscous Fan as Required.
OK
t
Incorrect Thermostat, Broken
Thermostat Jiggle Pin or
Contamination In Thermostat
Check/Replace Thermostat.
Incorrect Thermostat, Broken
Thermostat Jiggle Pin or
Contamination In Thermostat
OK
*
Temperature Sensor or Gage
Verify that the Gage ami Sensor are
Malfunctioning. Accurate.
OK
*
Coolant Not Flowing by Temperature
Check/Clean Coolant Passages.
Sensor