Medium Heavy Vehicle Diesel Engine 1

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1 Medium Heavy Vehicle Diesel Engine Student/intern information: Name Class Vehicle used for this activity: Year Make Model Odometer VIN Learning Objective / Task (General) 2007 NATEF Reference Number 2007 NATEF Priority Level Inspect fuel, oil, and coolant levels and condition; A1-1 P-1 determine needed action. Identify the causes of engine fuel, oil, coolant, air, A1-2 P-1 and other leaks; determine needed action. Listen for engine noises; determine needed A1-3 P-3 action. Observe engine exhaust smoke, color, and quantity; determine needed action. A1-4 P-3 Recommended Resource Materials CDX Automotive program CDX etextbook Technical service bulletins, shop manuals, and any other information applicable to the specific vehicle or components you are working on Class notes Materials Required Vehicle with possible engine concern Vehicle manufacturer s workshop manual Manufacturer-specific tools depending on the concern Vehicle lifting equipment if applicable For every task in Diesel Engines, the following safety task must be strictly enforced: Comply with personal and environmental safety practices associated with clothing; eye protection; hand protection; proper lifting practices; hand tools; power equipment; proper ventilation; and the handling, storage, and disposal of fuels/chemicals/materials in accordance with federal, state, and local regulations. Some Safety Issues to Consider Diagnosis of this fault may require test driving the vehicle on the school grounds or on a hoist, both of which carry severe risks. Attempt this task only with full permission from your supervisor/instructor and follow all the guidelines exactly. Caution: If you are working in an area where there could be brake dust present (may contain asbestos, which has been determined to cause cancer when inhaled or ingested), ensure you wear and use all OSHAapproved asbestos protective/removal equipment. Lifting equipment such as vehicle jacks and stands, vehicle hoists, and engine hoists are important tools that increase productivity and make the job easier. However, they can also cause severe injury or death if used improperly. Make sure you follow the manufacturer s operation procedures. Also make sure you have your supervisor/instructor s permission to use any particular type of lifting equipment. Comply with personal and environmental safety practices associated with clothing; eye protection; hand tools; power equipment; proper ventilation; and the handling, storage, and disposal of chemicals/materials in accordance with federal, state, and local regulations. Always wear the correct protective eyewear and clothing and use the appropriate safety equipment, as well as fender covers, seat protectors, and floor mat protectors. Make sure you understand and observe all legislative and personal safety procedures when carrying out practical assignments. If you are unsure of what these are, ask your supervisor/instructor. Medium Heavy Vehicle Diesel Engine 1

2 Performance Standard 0 No exposure: No information or practice provided during the program; complete training required 1 Exposure only: General information provided with no practice time; close supervision needed; additional training required 2 Limited practice: Has practiced job during training program; additional training required to develop skill 3 Moderately skilled: Has performed job independently during training program; limited additional training may be required 4 Skilled: Can perform job independently with no additional training Task Inspect fuel, oil, and coolant levels and condition; determine needed action. A Inspect fuel, oil, and coolant levels, and condition. 2. Reference the appropriate workshop manual. a. Identify the engine oil type and quantity. i. Recommended type of engine oil: ii. Recommended engine oil quantity: b. Identify the engine coolant type and quantity: i. Recommended type of engine coolant: ii. Recommended engine coolant quantity: 3. Using a clean glass container, drain off a sample of the diesel fuel from the fuel tank(s). a. Ensure there is no fuel spillage. b. Inspect the sample for any contaminations (e.g., water). c. If directed by your instructor, arrange for the fuel sample to be tested in accordance with industry standards. 4. Check the engine oil level as outlined in the workshop manual. a. Within manufacturer s specifications: Yes: No: b. If no, list the problems and your recommendation(s) for rectification: c. Using a clean glass container, drain off a sample of the diesel engine oil. d. If directed by your instructor, arrange for the engine oil sample to be tested in accordance with industry standards. Medium Heavy Vehicle Diesel Engine 2

3 5. Using a clean glass container, drain off a sample of the engine coolant from the radiator. a. Ensure there is no coolant spillage. b. Check the coolant levels: c. Inspect the sample for any contaminations (e.g., oil). d. If directed by your instructor, arrange for the coolant sample to be tested in accordance with industry standards. 6. Discuss the findings with your instructor NATEF Reference Number: A1-1 Task Identify the causes of engine fuel, oil, coolant, air, and other leaks. A Reference the manufacturer s workshop for the correct procedure for checking and identifying the main causes of engine fuel leaks. a. List all possible causes for engine fuel leaks: 2. Reference the manufacturer s workshop for the correct procedure for checking and identifying the main causes of engine oil leaks. a. List all possible causes for engine oil leaks: Medium Heavy Vehicle Diesel Engine 3

4 3. Reference the manufacturer s workshop for the correct procedure for checking and identifying the main causes of engine coolant leaks. a. List all possible causes for engine coolant leaks: 4. Reference the manufacturer s workshop for the correct procedure for checking and identifying the main causes of air and other leaks. a. List all possible causes for air and other leaks: 2007 NATEF Reference Number: A1-2 Task Listen for engine noises; determine needed action. A Start the engine. 2. Check engine starting/operation for any unusual noises and vibrations. a. List any usual noises from the engine (if any). If no noises are evident, record nil: b. Are there any vibrations coming from the engine? Yes: No: i. If yes, record where they are coming from: 3. Shut the engine down. 4. Referencing the appropriate workshop manual, record your recommendations to rectify the source of the abnormal engine noises and vibrations: Medium Heavy Vehicle Diesel Engine 4

5 5. Discuss your findings and recommendations with your instructor NATEF Reference Number: A1-3 Task Observe engine exhaust smoke, color, and quantity; determine needed action. A Start the engine. 2. Check the exhaust smoke. a. With the engine running: i. Record the idle RPM: ii. Record the governed RPM: iii. Record the color of the exhaust smoke from the stack: iv. Record the quantity of smoke coming from the exhaust (e.g., short bust, then cleared; longer bust, then cleared; large amount after start up and at idle): 3. Shut the engine down. 4. Referencing the appropriate workshop manual, record your recommendations to rectify the source of the abnormal exhaust smoke. 5. Discuss your findings and recommendations with your instructor NATEF Reference Number: A1-4 Medium Heavy Vehicle Diesel Engine 5