Dodge ZB 2005 - Page 667

CONDITION POSSIBLE CAUSES CORRECTION
CONNECTING ROD
NOISE
1. Insufficient oil supply. 1. Check engine oil level.
2. Low oil pressure. 2. Check engine oil level. If OK, perform
oil pressure test. Inspect oil pump relief
valve and spring. (Refer to 9 - ENGINE/
LUBRICATION - DIAGNOSIS AND TEST-
ING).
3. Thin or diluted oil. 3. Change oil and filter.
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 journals.
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. If OK, perform
oil pressure test. Inspect oil pump relief
valve and spring. (Refer to 9 - ENGINE/
LUBRICATION - DIAGNOSIS AND TEST-
ING).
3. Thin or diluted oil. 3. Change oil and filter.
4. Excessive bearing clearance. 4. Measure bearings for correct clearance.
Repair as necessary.
5. Excessive end play. 5. Check No. 3 bearing for wear on
flanges.
6. Crankshaft journal out-of-round
and/or worn.
6. Grind journals or replace crankshaft.
7. Loose flywheel. 7. Inspect crankshaft, flywheel, and bolts
for damage. Tighten bolts to correct
torque.
OIL PRESSURE DROP 1. Low oil level. 1. Check oil level and fill if necessary.
2. Faulty oil pressure sending unit. 2. Replace sending unit.
3. Clogged oil filter. 3. Install new oil filter.
4. Worn oil pump. 4. Replace worn gears or oil pump assem-
bly.
5. Thin or diluted oil. 5. Change oil to correct viscosity.
6. Excessive bearing clearance. 6. Measure bearings for correct clearance.
7. Oil pump relief valve stuck. 7. Remove relief valve. Inspect valve and
spring. Replace as necessary.
8. Oil pump pick up tube restricted,
cracked, or damaged.
8. Remove oil pan and inspect oil pump
pick up tube. Clean or replace as neces-
sary.
9. Oil pump cover loose, warped, or
cracked.
9. Inspect/tighten cover screws or install
new oil pump, if necessary.
9 - 6 ENGINE ZB
ENGINE - 8.3L (Continued)