GASKET KIT 1402385 - Caterpillar

Use this procedure to troubleshoot a high exhaust temperature. Also, use this procedure if one of the following event codes is active or logged.
Table 1
J1939 Code and Description CDL Code and Description Comments
173-0
Engine Exhaust Gas Temperature : High - most severe (3) E194 (3)
High Exhaust Temperature The exhaust gas temperature is higher than expected for the engine operating conditions.
173-15
Engine Exhaust Gas Temperature : High - least severe (1) E194 (1)
High Exhaust Temperature The exhaust gas temperature is higher than expected for the engine operating conditions.
173-16
Engine Exhaust Gas Temperature : High - moderate severity (2) E194 (2)
High Exhaust Temperature The exhaust gas temperature is higher than expected for the engine operating conditions. If the engine is shutdown due to a high exhaust temperature, the power to the engine Electronic Control Module (ECM) must be cycled to restart the engine.Note: Certain operating conditions may cause the calculated exhaust temperature to increase to a level that may damage engine components. If a high exhaust temperature occurs, the ECM derates the engine to reduce the calculated exhaust temperature. The engine is derated only to a level that allows the calculated exhaust temperature to return to an acceptable level.Note: High intake manifold air temperature, high altitude operation, and high engine loads can cause the exhaust temperature to increase to a level that may damage the components of the exhaust system. When this occurs, the ECM derates the engine to reduce the exhaust temperature. This protects the components of the exhaust system from damage.Probable Causes
Codes
Leaks
Intake air temperature
Inlet air restriction
Engine overload
Exhaust restriction
Deposits or leaksRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: A code is active or logged.
Proceed to Test Step 2.
2. Check the Inlet Air System for Leaks
Note: A leak in the air intake system may allow unfiltered air into the engine.
A. Inspect the following air system components:
- Gaskets
- Connections
Note: Streaks which may indicate a leakage of unfiltered air.
Air Leaks
Result: The inlet air system is OK.
Proceed to Test Step 5.
Result: The inlet air system is NOT OK.
Repair: Repair or replace damaged inlet air system components.
If the problem is not resolved, proceed to Test Step 5.
3. Check for High Intake Air Temperature
Note: A one degree increase in the intake manifold temperature will increase the exhaust temperature by approximately three degrees.
A. Refer to Troubleshooting, "Intake Manifold Air Temperature Is High" for additional information.
Temperature
Result: The intake manifold air temperature is OK.
Proceed to Test Step 4.
Result: The intake manifold air temperature is NOT OK.
Repair: Determine the cause of the high intake manifold air temperature and correct the problem.
If the problem is not resolved, proceed to Test Step 4.
4. Check for a Restriction in the Inlet Air System
Note: Inlet air restriction can cause uneven exhaust port temperatures. Cylinders at the front half of the engine may have exhaust port temperatures