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CONDITION POSSIBLE CAUSES CORRECTION MAIN BEARING NOISE 1. Insufficient oil supply. 1. Check engine oil level. 2. Low oil pressure. 2. Check engine oil level. Inspect oil 3. Thin or diluted oil. 3. Change oil to correct viscosity. 4. Thick oil 4. (a) Change engine oil and filter. (b) Run engine to operating (c) Change engine oil and filter 5. Excessive bearing clearance. 5. Measure bearings for correct 6. Excessive end play. 6. Check thrust bearing for wear on 7. Crankshaft journal out-of-round 7. Replace crankshaft or grind 8. Loose flywheel or torque 8. 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 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, 8. Oil pump suction tube loose. 8. Remove oil pan and install new 9. Oil pump cover warped or 9. Install new oil pump. 10. Excessive bearing clearance. 10. Measure bearings for correct OIL LEAKS 1. Misaligned or deteriorated 1. Replace gasket(s). 2. Loose fastener, broken or porous 2. Tighten, repair or replace the 3. Misaligned or deteriorated cup or 3. Replace as necessary. 9 - 94 ENGINE 2.4L DOHC TURBO PL/SRT-4 ENGINE 2.4L DOHC TURBO (Continued) |