Section 16.2 Insufficient Radiator Air Circulation

Section 16.2
Insufficient Radiator Air Circulation

To determine if insufficient radiator air circulation is causing low engine coolant temperature, visually examine the radiator and radiator shrouding.‪

1. If the radiator has excessive clogging, debris, or dirt, refer to "16.2.1 Exterior Radiator Repair" .
2. If the radiator shrouding is not damaged, incorrectly positioned, or inadequate, and if the radiator is absent of clogging, debris, and dirt, then call Detroit Diesel Customer Support Center at 313-592-5800.
3. If the radiator shrouding is damaged, incorrectly positioned, or inadequate, refer to "16.2.2 Radiator Shroud Repair" .

Section 16.2.1
Exterior Radiator Repair

Perform the following steps for exterior radiator repair:‪

1. Clean the exterior radiator of all clogging, debris, or excessive dirt; refer to OEM guidelines.
2. Verify exterior radiator repair; refer to "16.2.2.1 Test Engine with Repaired Exterior Radiator and Shrouding" .

Section 16.2.2
Radiator Shroud Repair

Perform the following steps for radiator shroud repair:‪

1. Repair or replace damaged radiator shrouding; refer to OEM guidelines.
2. Verify exterior radiator repair; refer to "16.2.2.1 Test Engine with Repaired Exterior Radiator and Shrouding" .

Section 16.2.2.1
Test Engine with Repaired Exterior Radiator and Shrouding

Perform the following steps to determine if exterior radiator or shrouding repair resolved the low engine coolant temperature:‪

PERSONAL INJURY ‪
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.‪

1. Start and run the engine.
2. Run the engine through its operating range with no-load condition for approximately five minutes, allowing the engine coolant to reach normal operating range.
   1. If the engine coolant temperature is 70-95°C (158-203°F), no further troubleshooting is required. Shut down the engine.
   2. If the engine coolant temperature is not 70-95°C (158-203°F), shut down the engine. Call Detroit Diesel Customer Support Center at 313-592-5800.