Dodge 2000 DURANGO - Page 654

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