Dodge D250 1990 Service Manual page 160

Base Engine Components
DODGE Turbo Diesel
Troubleshooting Logic
Page 9A-21
Coolant Temperature Above Normal (Continued)
Cause
Correction
Malfunctioning Temperature
Verify that the Gage and Temperature
Sensor/Gage Sensor are Accurate.
OK
Malfunctioning, Incorrect or No
Check/Replace the Thermostat.
Thermostat
OK
•
Air in the Cooling System
Make sure the Fill Rate is not Being
Exceeded and the Correct Vented
Thermostat is Installed.
OK
OK
t
I
Check for Loose Hose Clamps.
If Aeration Continued, Check for a
Compression Leak Through the Head
Gasket.
Malfunctioning Water Pump Check/Replace the Water Pump
OK
•
Incorrect Injection Pump Timing Verify Pump Timing Marks are Aligned.
Check/Time the Injection Pump.
OK
*
Overfueled Injection Pump
Replace the Injection Pump.
(Continued)