984764 Volvo.Penta Flange screw

Introduction
Troubleshooting can be difficult. The Troubleshooting Index gives a list of possible problems. To make a repair to a problem, see the possible cause and corrective action on the pages that follow. Some corrective action procedures direct you to follow PEEC III Engine Test Procedure P- or PEEC III Engine Diagnostic Code, These procedures are in Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.This list of problems, causes and corrections will only give an indication of where a possible problem can be, and what repairs are needed. Normally, more or other repair work is needed beyond the recommendations in the list.Service personnel may remember similar complaints which were corrected by a previous method of troubleshooting. However, just because the complaint is the same the cause for the complaint can be different.Be sure to get a good description of the problem from the operator and/or the person who owns the vehicle. What they tell you about the problem can save you time and make the repair job faster and easier.Troubleshooting Problem List
1. Loud combustion Noise2. Fuel Consumption Too High3. Too Much Black Or Gray Smoke4. Too Much White Or Blue Smoke5. Engine Has Low Oil Pressure6. Engine Overheating7. Engine Over Cooling8. Coolant Leaks Outside of Engine9. Coolant Leaks at the Overflow Tube10. Coolant Leakage Inside Engine11. Fuel in Crankcase Oil For PEEC III System Troubleshooting, see Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.Troubleshooting Problems
Problem 1: Loud Combustion Noise
Probable Cause:1. Bad quality or water in fuel Follow the recommendations given in Special Instruction, Form No. SEHS7067, Fuel Recommendations For Caterpillar Diesel Engines. Also, Special Instruction, Form No. SEHS6947 has fuel correction factors and tables.2. Defective fuel injection nozzle Remove the fuel nozzles. Use the procedure given in the Testing and Adjusting section to test the fuel nozzles.3. Defective fuel injection pump An injection pump can have a good fuel flow coming from it but cause rough running because of slow timing that is caused by wear on the bottom end of the plunger. See the Testing and Adjusting section for the correct specifications and procedure to check the plungers and lifters.4. Wrong fuel injection timing Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.5. Wrong timing position sensor calibration Refer to see Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.6. PEEC III system component fault Refer to see Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.Problem 2: Fuel Consumption Too High
Make reference to Section I, Understanding Truck Performance Complaints, in the Truck Performance Diagnostic Guide, Form No. SEBD0808 for additional information other than engine related problems. Probable Cause:1. MPG Measurement errors Follow truck high fuel consumption check list:* Miles measured correctly* Fuel measured correctly* Comparison to other trucks* Different truck or engine specifications* Different operating loads* Different operating modes2. Bad quality or water in fuel Follow the recommendations given in Special Instruction, Form No. SEHS7067, Fuel Recommendations For Caterpillar Diesel Engines. Also, Special Instruction, Form No. SEHS6947 has fuel correction factors and tables.3. Fuel system leaks Inspect the fuel system for leaks and make repairs or replacements as needed.4. Excess idle time Shut engine off when not in use.5. Excess road speed or operation at high engine speeds Reduce road speed and follow progressive shifting driving guidelines.6. Excess wind drag Decrease cab to trailer gap, add air deflector.7. Brakes dragging Adjust or repair brakes.8. Fuel and combustion noise (knock) Check items listed in Problem Nos. 3, 6, and 7. SEE TROUBLE SHOOTING GUIDE.9. Wrong fuel injection timing Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.10. Wrong timing position sensor calibration Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.11. Wrong Rack Position Sensor calibration Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.Problem 3: Too Much Black Or Gray Smoke
Probable Cause:1. Not enough air for combustion Check for a plugged air cleaner element or blockage in the air lines. Follow the procedures in the Testing and Adjusting section to check inlet manifold pressure and aftercooler core leakage.2. Defective fuel injection nozzle Remove the fuel nozzles. Use the procedure given in the Testing and Adjusting section to test the fuel nozzles.3. Wrong fuel injection timing Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.4. Wrong timing position sensor calibration Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.5. Wrong Rack Position Sensor calibration Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.6. PEEC III system component fault Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.Problem 4: Too Much White Or Blue Smoke
Probable Cause:1. Too much oil in engine Do not put too much oil in the crankcase. If the oil level in the crankcase goes up as the engine is used, check for fuel in the crankcase. Make repairs or replacements to the fuel injection lines and nozzles as needed to keep fuel out of the crankcase.2. Engine misfires or runs rough Check items listed in Problem No. 3. Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.3. Wrong fuel injection timing Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.4. Wrong timing position sensor calibration Refer to Troubleshooting 3406B (PEEC III) Truck Engine Test Procedures, Form No. SENR5147.5. Coolant in combustion system Coolant in the combustion chamber can cause white smoke. A cracked cylinder head or liner, also a bad cylinder head gasket are possible causes for this condition.6. Failed turbocharger oil seal Check inlet manifold and aftercooler core for oil. Make a repair or replacement of the turbocharger as needed.7. Worn valve guides See the Specifications module for the maximum permissible wear of the valve guides.8. Worn piston rings Worn piston rings and/or cylinder walls can be the cause of blue smoke and can cause a loss of compression. Make a visual inspection of