Engine Mechanical
WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|---|---|
| NOISY VALVES | 1. High or low oil level in crankcase. | 1. Check and correct engine oil level. |
| 2. Thin or diluted oil. | 2. Change oil to correct viscosity. | |
| 3. Thick oil | 3. (a.) Change oil and filter. | |
| (b.) Run engine to operating temperature. | ||
| (c.) Change oil and filter again. | ||
| 4. Low oil pressure. | 4. Check and correct engine oil level. | |
| 5. Dirt in tappets/lash adjusters. | 5. Replace rocker arm/hydraulic lash adjuster assembly. | |
| 6. Worn rocker arms. | 6. Inspect oil supply to rocker arms. | |
| 7. Worn tappets/lash adjusters. | 7. Install new rocker arm/hydraulic lash adjuster assembly. | |
| 8. Worn valve guides. | 8. Replace cylinder head(s). | |
| 9. Excessive runout of valve seats on valve faces. | 9. Grind valve seats and valves. | |
| 10. Missing adjuster pivot. | 10. Replace rocker arm/hydraulic lash adjuster assembly. | |
| CONNECTING ROD NOISE | 1. Insufficient oil supply. | 1. Check engine oil level. |
| 2. Low oil pressure. | 2. Check engine oil level. Inspect oil pump relief valve and spring. | |
| 3. Thick, Thin or diluted oil. | 3. Change oil to correct viscosity. | |
| - | 3. (a.) Change oil and filter. | |
| (b.) Run engine to operating temperature. | ||
| (c.) Change oil and filter again. | ||
| 4. Excessive bearing clearance. | 4. Measure bearings for correct clearance. Repair as necessary. | |
| 5. Connecting rod journal out-of-round. | 5. Replace crankshaft or grind surface. | |
| 6. Misaligned connecting rods. | 6. Replace bent connecting rods. | |
| MAIN BEARING NOISE | 1. Insufficient oil supply. | 1. Check engine oil level. |
| 2. Low oil pressure. | 2. Check engine oil level. Inspect oil pump relief valve and spring. | |
| 3. Thick/Thin or diluted oil. | 3. Change oil to correct viscosity. | |
| - | 3. (a.) Change oil and filter. | |
| (b.) Run engine to operating temperature. | ||
| (c.) Change oil and filter again. | ||
| 4. Excessive bearing clearance. | 4. Measure bearings for correct clearance. Repair as necessary. | |
| 5. Excessive end play. | 5. Check thrust bearing for wear on flanges. | |
| 6. Crankshaft journal out-of-round or worn. | 6. Replace crankshaft or grind journals. | |
| 7. Loose flywheel or torque converter. | 7. Tighten to correct torque. | |
| OIL PRESSURE DROP | 1. Low oil level. | 1. Check engine oil level. |
| 2. Faulty oil pressure sending unit. | 2. Install new sending unit. | |
| 3. Low oil pressure. | 3. Check sending unit and main bearing oil clearance. | |
| 4. Clogged oil filter. | 4. Install new oil filter. | |
| 5. Worn parts in oil pump. | 5. Replace worn parts or pump. | |
| 6. Thin or diluted oil. | 6. Change oil to correct viscosity. | |
| 7. Oil pump relief valve stuck. | 7. Remove valve and inspect, clean or replace. | |
| 8. Oil pump suction tube loose. | 8. Remove oil pan and install new tube or clean, if necessary. | |
| 9. Oil pump cover warped or cracked. | 9. Install new oil pump. | |
| 10. Excessive bearing clearance. | 10. Measure bearings for correct clearance. | |
| OIL LEAKS | 1. Misaligned or deteriorated gaskets. | 1. Replace gasket(s). |
| 2. Loose fastener, broken or porous metal part. | 2. Tighten, repair or replace the part. | |
| 3. Misaligned or deteriorated cup or threaded plug. | 3. Replace as necessary. | |
| OIL CONSUMPTION OR SPARK PLUGS FOULED | 1. PCV system malfunction. | 1. Check system and repair as necessary. (Refer to appropriate diagnostic informationl) |
| 2. Worn, scuffed or broken rings. | 2. Hone cylinder bores. Install new rings. | |
| 3. Carbon in oil ring slots. | 3. Clean pistons and install new rings. | |
| 4. Rings fitted too tightly in grooves. | 4. Remove rings and check grooves. If groove is not proper width, replace piston. | |
| 5. Worn valve guide(s). | 5. Replace cylinder head(s). | |
| 6. Valve stem seal(s) worn or damaged. | 6. Replace seal(s). |