SEAL-O-RING 4361101 - Caterpillar

Probable Causes
Starting Aids
Ether injection
Jacket water heaterCold mode
Cold mode operation
Coolant leakEngine Speed/Timing
Engine speed/timing sensorPersonality Module
Personality moduleFuel
Injector
Fuel supplyLow Compression
Component wearRecommended Actions
Ether Injection
If the application has an ether injection system, ensure that the ether canister is not empty or low. Replace the ether canister if the ether canister is empty or low. If an electrical problem with the ether injection system is suspected, refer to the particular test procedure for your application.Jacket Water Heater
If the application has a jacket water heater, check for proper operation of the circuit. Repair the circuit for the jacket water heater, if necessary.Cold Mode Operation
Excessive white smoke emissions may occur during cold mode operation of the engine. Verify that cold mode is active when the engine is cold. Monitor the oil temperature on Caterpillar Electronic Technician (ET). Ensure that the oil and coolant temperature that is displayed is reasonable. Both readings should increase slowly as the engine warms up.Coolant Leak
Check for an internal coolant leak into the cylinder and/or the exhaust.Engine Speed/Timing Sensor
Check the calibration of the engine speed/timing sensor(s). Refer to Troubleshooting, "Timing - Calibrate".
Verify that the timing of the crankshaft and camshaft drive gears are set with the proper orientation. Refer to Disassembly and Assembly for information that is related to the correct gear installation.Personality Module
Verify that the correct personality module is installed for the engine configuration and the engine application.Injector
Perform the "Cylinder Cutout Test" on Cat ET in order to try to isolate any cylinders that may be misfiring. A misfiring cylinder could be related to an injector that is worn or in poor repair. Refer to Troubleshooting, "Injector Solenoid - Test".
Cut out each individual cylinder for 30 to 60 seconds. Verify that the smoke decreases.
If Cat ET indicates a problem, remove the electronic unit injector from the suspect cylinder. Refer to Disassembly and Assembly.Fuel Supply
Inspect the fuel system components and check for correct fuel pressure. Check fuel quality. Low cetane fuel can create white smoke. Replace the low cetane fuel with higher cetane fuel. In temperatures below 0°C (32°F), check for solidified fuel (wax). Refer to, SEBD0717, "Diesel Fuels And Your Engine".Component Wear
Check the valve lash and reset the valve lash, if necessary. Refer to Systems Operation/Testing and Adjusting.
Possible causes of low compression are shown in the following list:
Faulty piston
Faulty piston rings
Worn cylinder bores
Worn valves
Faulty cylinder head gasket
Damaged cylinder head
Perform all necessary repairs. Ensure that the repairs have eliminated the problem.