G3516 TA Engine Caterpillar

Exhaust Temperature Is High

Usage:

Use this procedure to troubleshoot a high exhaust temperature. Also, use this procedure if one of the following event codes is active or logged.

Note: The turbocharger code for high temp trigger is shifted up (based off max set point) during "No or Low Load Conditions", but code will still be generated once the unit hits higher load set point and trigger temp code.

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Table 1
J1939 Code and Description	Comments
1137-0 Engine Exhaust Gas Port 1 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1138-0 Engine Exhaust Gas Port 2 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1139-0 Engine Exhaust Gas Port 3 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1140-0 Engine Exhaust Gas Port 4 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1141-0 Engine Exhaust Gas Port 5 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1142-0 Engine Exhaust Gas Port 6 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1143-0 Engine Exhaust Gas Port 7 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1144-0 Engine Exhaust Gas Port 8 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1145-0 Engine Exhaust Gas Port 9 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1146-0 Engine Exhaust Gas Port 10 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1147-0 Engine Exhaust Gas Port 11 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1148-0 Engine Exhaust Gas Port 12 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1149-0 Engine Exhaust Gas Port 13 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1150-0 Engine Exhaust Gas Port 14 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1151-0 Engine Exhaust Gas Port 15 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1152-0 Engine Exhaust Gas Port 16 Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1180-0 Engine Turbocharger #1 Turbine Intake Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1181-0 Engine Turbocharger #2 Turbine Intake Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1184-0 Engine Turbocharger #1 Turbine Outlet Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
1185-0 Engine Turbocharger #2 Turbine Outlet Temperature : High - most severe (3)	The engine is shutdown. The code is logged.

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Table 2
J1939 Code and Description	Comments
1137-15 Engine Exhaust Gas Port 1 Temperature : High - least severe (1)	The code is logged.
1138-15 Engine Exhaust Gas Port 2 Temperature : High - least severe (1)	The code is logged.
1139-15 Engine Exhaust Gas Port 3 Temperature : High - least severe (1)	The code is logged.
1140-15 Engine Exhaust Gas Port 4 Temperature : High - least severe (1)	The code is logged.
1141-15 Engine Exhaust Gas Port 5 Temperature : High - least severe (1)	The code is logged.
1142-15 Engine Exhaust Gas Port 6 Temperature : High - least severe (1)	The code is logged.
1143-15 Engine Exhaust Gas Port 7 Temperature : High - least severe (1)	The code is logged.
1144-15 Engine Exhaust Gas Port 8 Temperature : High - least severe (1)	The code is logged.
1145-15 Engine Exhaust Gas Port 9 Temperature : High - least severe (1)	The code is logged.
1146-15 Engine Exhaust Gas Port 10 Temperature : High - least severe (1)	The code is logged.
1147-15 Engine Exhaust Gas Port 11 Temperature : High - least severe (1)	The code is logged.
1148-15 Engine Exhaust Gas Port 12 Temperature : High - least severe (1)	The code is logged.
1149-15 Engine Exhaust Gas Port 13 Temperature : High - least severe (1)	The code is logged.
1150-15 Engine Exhaust Gas Port 14 Temperature : High - least severe (1)	The code is logged.
1151-15 Engine Exhaust Gas Port 15 Temperature : High - least severe (1)	The code is logged.
1152-15 Engine Exhaust Gas Port 16 Temperature : High - least severe (1)	The code is logged.
1180-15 Engine Turbocharger #1 Turbine Intake Temperature : High - least severe (1)	The code is logged.
1181-15 Engine Turbocharger #2 Turbine Intake Temperature : High - least severe (1)	The code is logged.
1184-15 Engine Turbocharger #1 Turbine Outlet Temperature : High - least severe (1)	The code is logged.
1185-15 Engine Turbocharger #2 Turbine Outlet Temperature : High - least severe (1)	The code is logged.

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Table 3
J1939 Code and Description	Comments
1137-19 Engine Exhaust Gas Port 1 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1138-19 Engine Exhaust Gas Port 2 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1139-19 Engine Exhaust Gas Port 3 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1140-19 Engine Exhaust Gas Port 4 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1141-19 Engine Exhaust Gas Port 5 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1142-19 Engine Exhaust Gas Port 6 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1143-19 Engine Exhaust Gas Port 7 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1144-19 Engine Exhaust Gas Port 8 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1145-19 Engine Exhaust Gas Port 9 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1146-19 Engine Exhaust Gas Port 10 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1147-19 Engine Exhaust Gas Port 11 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1148-19 Engine Exhaust Gas Port 12 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1149-19 Engine Exhaust Gas Port 13 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1150-19 Engine Exhaust Gas Port 14 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1151-19 Engine Exhaust Gas Port 15 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated
1152-19 Engine Exhaust Gas Port 16 Temperature : Data Error	The cylinder exhaust temperature is out of range for at least four seconds. The code is logged. The alarm output is activated

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Table 4
J1939 Code and Description	Comments
5686-0 Engine Exhaust Gas Port #1 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5687-0 Engine Exhaust Gas Port #2 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5688-0 Engine Exhaust Gas Port #3 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5689-0 Engine Exhaust Gas Port #4 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5690-0 Engine Exhaust Gas Port #5 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5691-0 Engine Exhaust Gas Port #6 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5692-0 Engine Exhaust Gas Port #7 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5693-0 Engine Exhaust Gas Port #8 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5694-0 Engine Exhaust Gas Port #9 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5695-0 Engine Exhaust Gas Port #10 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5696-0 Engine Exhaust Gas Port #11 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5697-0 Engine Exhaust Gas Port #12 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5698-0 Engine Exhaust Gas Port #13 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5699-0 Engine Exhaust Gas Port #14 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5700-0 Engine Exhaust Gas Port #15 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.
5701-0 Engine Exhaust Gas Port #16 Difference from Average Temperature : High - most severe (3)	The engine is shutdown. The code is logged.

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Table 5
J1939 Code and Description	Comments
5686-15 Engine Exhaust Gas Port #1 Difference from Average Temperature : High - least severe (1)	The code is logged.
5687-15 Engine Exhaust Gas Port #2 Difference from Average Temperature : High - least severe (1)	The code is logged.
5688-15 Engine Exhaust Gas Port #3 Difference from Average Temperature : High - least severe (1)	The code is logged.
5689-15 Engine Exhaust Gas Port #4 Difference from Average Temperature : High - least severe (1)	The code is logged.
5690-15 Engine Exhaust Gas Port #5 Difference from Average Temperature : High - least severe (1)	The code is logged.
5691-15 Engine Exhaust Gas Port #6 Difference from Average Temperature : High - least severe (1)	The code is logged.
5692-15 Engine Exhaust Gas Port #7 Difference from Average Temperature : High - least severe (1)	The code is logged.
5693-15 Engine Exhaust Gas Port #8 Difference from Average Temperature : High - least severe (1)	The code is logged.
5694-15 Engine Exhaust Gas Port #9 Difference from Average Temperature : High - least severe (1)	The code is logged.
5695-15 Engine Exhaust Gas Port #10 Difference from Average Temperature : High - least severe (1)	The code is logged.
5696-15 Engine Exhaust Gas Port #11 Difference from Average Temperature : High - least severe (1)	The code is logged.
5697-15 Engine Exhaust Gas Port #12 Difference from Average Temperature : High - least severe (1)	The code is logged.
5698-15 Engine Exhaust Gas Port #13 Difference from Average Temperature : High - least severe (1)	The code is logged.
5699-15 Engine Exhaust Gas Port #14 Difference from Average Temperature : High - least severe (1)	The code is logged.
5700-15 Engine Exhaust Gas Port #15 Difference from Average Temperature : High - least severe (1)	The code is logged.
5701-15 Engine Exhaust Gas Port #16 Difference from Average Temperature : High - least severe (1)	The code is logged.

Probable Causes

Codes
Intake air temperature
Inlet air restriction
Engine overload
Exhaust restriction
Air/Fuel Ratio
Valve lash
Excessive deposits

Recommended Actions

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Table 6
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 for High Intake Manifold Air Temperature Note: A 1 degree increase in the inlet manifold temperature will increase the exhaust temperature by approximately 3 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 3. 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 3.
3. Check for a Restriction in the Inlet Air System Note: Inlet air restriction can cause uneven exhaust port temperatures. A. Check the air filter restriction indicator, if equipped. Refer to the Operation and Maintenance Manual for additional information. B. Refer to Troubleshooting, "Inlet Air Is Restricted" for additional information. Note: High cylinder temperatures can cause a high coolant temperature.	Restriction	Result: The inlet air restriction is OK. Proceed to Test Step 4. Result: The inlet air restriction is NOT OK. An imbalance in the system is discovered. Repair: Repair or replace damaged inlet air system components. Equalize the inlet air restriction for each of the turbochargers. If the problem is not resolved, proceed to Test Step 4.
4. Check for Engine Overload Note: When the load that is applied to the engine is too large, the engine will run in the lug condition. When the engine is running in the lug condition, engine rpm will try to maintain rated speed but the load applied may cause the engine speed to be lower.	Load	Result: The engine is not being overloaded. Proceed to Test Step 5. Result: The engine is being overloaded. Repair: Reduce engine load to an acceptable limit. If the problem is not resolved, proceed to Test Step 5.
5. Check for a Restriction in the Exhaust System Note: A restriction of the exhaust can cause high cylinder temperatures. A. Measure the exhaust restriction during engine operation with a load. For data that is specific to your engine, refer to the Technical Marketing Information (TMI).	Restriction	Result: The exhaust restriction measures OK. Proceed to Test Step 6. Result: The exhaust restriction measurement is NOT OK. Repair: Repair or replace damaged exhaust system components. If the problem is not resolved, proceed to Test Step 6.
6. Check the Air/Fuel Ratio Note: An air/fuel mixture that is too rich will increase the exhaust temperature. A change in the fuel energy content will change the air/fuel ratio. Note: If the setting for the fuel LHV is too low, the air/fuel ratio will be too rich. A. Obtain a fuel analysis. Note: If the quality of the gas is inconsistent, obtain several analyses over a time. B. Enter the data into Caterpillar Software , "Gas Engine Ratings Pro (GERP)". C. Verify that the fuel supply pressure is adequate and stable. D. Verify that the exhaust emissions are correct.	Air/Fuel Ratio	Result: The air/fuel ratio is OK. Proceed to Test Step 7. Result: The air/fuel ratio is NOT OK. Repair: Use Cat ET to program the results for the "Fuel Specific Heat Ratio", "Fuel Quality", and "Gas Specific Gravity" parameters. Refer to Systems Operation, "Electronic Control System Parameters" for additional information. Program the "Fuel Quality" parameter to the average value of the LHV. Adjust the GERP calculated fuel quality setting for engine operation according to Testing and Adjusting, Air/Fuel Ratio Control Adjust. If the problem is not resolved, proceed to Test Step 7.
7. Check the Valve Lash Note: The valve lash can affect the performance of the engine. A. Make sure that the retainer for the gas admission valve support assembly is installed. Note: If the retainer is missing from the gas admission valve support assembly, the air/fuel mixture will be too rich.	Valve Lash	Result: The valve lash is OK. Proceed to Test Step 8. Result: The valve lash is NOT OK. Repair: Reset the valve lash. Refer to Testing and Adjusting, "Valve Lash and Valve Bridge Adjustment" for additional information. If the problem is not resolved, proceed to Test Step 8.
8. Excessive Deposits in the Combustion Chamber A. Overfilling of engine oil can lead to deposits. Check the oil level. B. Use a borescope to inspect the cylinders. Look for the following conditions: - Deposits on the valve seats - Deposits on the valve face - Deposits on the cylinder walls that are above the upper limit of the piston stroke - Signs of internal leaks Note: Signs of internal leaks include excessive consumption of engine oil, blue smoke, and excessive detonation.	Deposits	Result: Deposits or signs of internal leaks are found. Repair: Investigate the cause of the condition. Repair or replace damaged components. Verify that the repair eliminated the problem.

If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).