Dodge RAM 1500 1998 Owner's Manual page 1412

DR
ENGINE - 5.7L (Continued)
CONDITION
MAIN BEARING NOISE
LOW OIL PRESSURE
OIL LEAKS
POSSIBLE CAUSES
1. Insufficient oil supply
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
1. Low oil level
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 pickup tube loose, broken,
bent or clogged
9. Oil pump cover warped or
cracked
1. Misaligned or deteriorated
gaskets
2. Loose fastener, broken or porous
metal part
3. Front or rear crankshaft oil seal
leaking
4. Leaking oil gallery plug or cup
plug
ENGINE - 5.7L
CORRECTION
1. Check engine oil level.
2. Check engine oil level. If ok,
Perform oil pressure test. (Refer to
9 - ENGINE/LUBRICATION -
DIAGNOSIS AND TESTING)
3. Change oil to correct viscosity.
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 oil pump assembly.
5. Change oil to correct viscosity.
6. Measure bearings for correct
clearance
7. Remove valve to inspect, clean
and reinstall
8. Inspect oil pickup tube and pump,
and clean or replace if necessary
9. Install new oil pump
1. Replace gasket
2. Tighten, repair or replace the part
3. Replace seal
4. Remove and reseal threaded
plug. Replace cup style plug
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