M11 – Intake Manifold Air Temperature Above Specification

Symptom Tree  

Vehicle speed is too low for adequate cooling with high engine load

Reduce the engine load. Increase the engine (fan) rpm by downshifting.


Fan shroud is damaged or missing or the air recirculation baffles are damaged or missing

Inspect the shroud and the recirculation baffles. Repair, replace, or install, if necessary. Refer to the OEM service manual.


Fan drive belt is broken or loose

Check the fan drive belt. Replace the belt if necessary. Refer to Procedure 103-002 (Drive Belts) in Section 3.


Cold weather radiator cover or winterfront is closed

Open the cold weather radiator cover or the winterfront. Maintain a minimum of 784 cm2 [122 in2] or approximately 28 x 28 cm [11 x 11 in] of opening at all times. Refer to Procedure 101-015 (Operating the Engine) in Section 1.


Radiator shutters are not opening completely, or the shutterstat setting is wrong

Inspect the radiator shutters. Repair or replace if necessary. Check the shutterstat setting. Refer to the OEM service manual.


Charge air cooler fins, radiator fins, or air conditioner condenser fins are damaged or obstructed with debris

Inspect the charge air cooler, air conditioner condenser, and radiator fins. Clean, if necessary. Refer to Procedure 010-028 (Charge Air Piping) in Section 3.

Contact a Cummins Authorized Repair Facility

Last Modified:  19-Nov-2004