42 RENR5042-02 Troubleshooting Section i02280972 Excessive Valve Lash 3. Adjust the engine valve lash. Refer to the engine’s Systems Operation/Testing and Adjusting manual for the correct procedure. SMCS Code: 1105-035 Probable Causes i02290300 Excessive White Smoke Lubrication SMCS Code: 1088-035 Valve lash Note: Some white smoke may be present during cold start-up conditions when the engine is operating normally. If the white smoke persists, there may be a problem. Valve train components Recommended Actions Lubrication Probable Causes 1. Remove the valve mechanism covers. Refer to the engine’s Disassembly and Assembly manual for the correct procedure.
Diagnostic codes Starting aids Water temperature regulators 2. Check the lubrication in the valve compartment. Ensure that there is adequate engine oil flow in the valve compartment. The passages for the engine oil must be clean. Unit injectors Flash file Valve Lash Fuel supply Cooling system Adjust the engine valve lash. Refer to the engine’s Systems Operation/Testing and Adjusting manual for the correct procedure. Component wear Valve Train Components Recommended Actions 1. Inspect the following components of the valve train: Diagnostic Codes Check for active diagnostic codes on the Caterpillar Electronic Technician (ET). Troubleshoot any active codes before continuing with this procedure.
Rocker arms Pushrods Starting Aids Valve lifters Camshaft Air Inlet Heater (If Equipped) Valve stems Ensure that the air inlet heater is functioning properly. For additional information, refer to Troubleshooting, “Air Inlet Heater Circuit - Test”. Rocker shafts 2. Check the components for the following conditions: abnormal wear, excessive wear, straightness, and cleanliness. Replace parts, if necessary. Ether Injection System (If Equipped) Ensure that the ether injection system is programmed to Note: If you replace the camshaft, you must also replace the valve lifters. Ensure that the ether injection system is functioning properly.
For additional information, refer to Troubleshooting, “Ether Injection System - Test”.