VALVE GRINDING 5P8964 - Caterpillar

Use this procedure in order to troubleshoot a high turbocharger turbine inlet temperature.Probable Causes
Diagnostic codes and event codes
Air inlet and exhaust system
Fuel injectors
Aftercooler (if equipped)
Accessory equipmentRecommended Actions
Diagnostic Codes and Event Codes
Connect Cat (ET) to the service tool connector. Check for active diagnostic codes and event codes. Troubleshoot any codes that are present before continuing with this procedure.Air Inlet and Exhaust System
Check for air inlet restrictions and/or leaks. A one degree increase in the inlet manifold temperature will increase the exhaust temperature by approximately three degrees. Check for leaks between the exhaust manifold and the turbochargers. Check for exhaust restrictions. Refer to the Systems Operation/Testing and Adjusting manual for more information that is related to inspecting the air inlet and exhaust system.Fuel Injectors
Faulty injectors that deliver too much fuel will increase exhaust temperatures. Connect Cat ET in order to determine if any diagnostic codes for the injector solenoids are present.Perform the "Injector Solenoid Test". Check that the injector solenoids are "OK" on Cat ET. Perform the "Cylinder Cutout Test". Locate the misfiring cylinder and correct the problem.Refer to Troubleshooting, "Injector Solenoid - Test".Aftercooler (if equipped)
Normal intake manifold pressure with high exhaust temperature can be caused by blockage of the fins of the aftercooler core.If the application has an aftercooler, check the aftercooler for plugging. Check for blockage in the cores of the aftercooler.Accessory Equipment
Ensure that the accessory equipment is not lugging down the engine.