Dodge 2000 DURANGO Service Manual page 654

9 - 144 5.9L ENGINE
DIAGNOSIS AND TESTING (Continued)
CONDITION
CONNECTING 1. Insufficient oil supply
ROD NOISE
2. Low oil pressure
3. Thin or diluted oil
4. Excessive connecting
rod bearing clearance
5. Connecting rod
journal out of round
6. Misaligned
connecting rods
MAIN BEARING 1. Insufficient oil supply
NOISE
2. Low oil pressure
3. Thin or diluted oil
4. Excessive main
bearing clearance
5. Excessive end play
6. Crankshaft main
journal out of round or
worn
7. Loose flywheel or
torque converter
LOW OIL 1. Low oil level
PRESSURE
2. Faulty oil pressure
sending unit
3. Clogged oil filter
4. Worn oil pump
5. Thin or diluted oil
6. Excessive bearing
clearance
7. Oil pump relief valve
stuck
8. Oil pump suction
tube loose, broken, bent
or clogged
9. Oil pump cover
warped or cracked
POSSIBLE CAUSES
1. Check engine oil level. (Refer to group 0, Lubrication and
Maintenance)
2. Check engine oil level. If ok, Perform oil pressure test. Refer to
this group for engine oil pressure test/specifications
3. Change oil to correct viscosity. Refer to this group for correct
procedure/engine oil specifications
Measure bearings for correct clearance with plasti-gage. Repair
as necessary
5. Replace crankshaft or grind journals
6. Replace bent connecting rods
1. Check engine oil level. (Refer to group 0, Lubrication and
Maintenance)
2. Check engine oil level. If ok, Perform oil pressure test. Refer to
this group for engine oil pressure test/specifications
3. Change oil to correct viscosity. Refer to this group for correct
procedure/engine oil specifications
4. Measure bearings for correct clearance. Repair as necessary
5. Check crankshaft thrust bearing for excessive wear on flanges
6. Grind journals or replace crankshaft
7. Inspect crankshaft, flexplate/flywheel and bolts for damage.
Tighten to correct torque
1. Check oil level and fill if necessary
2. Install new sending unit
3. Install new oil filter
4. Replace worn gears or oil pump assy
5. Change oil to correct viscosity. Refer to this group for correct
procedure/engine oil specifications
6. Measure bearings for correct clearance
7. Remove valve to inspect, clean and reinstall
8. Inspect suction tube and clean or replace if necessary
9. Install new oil pump
CORRECTION
DN