Dodge dakota 2002 Service Manual page 1477

9 - 228 ENGINE - 5.9L
ENGINE - 5.9L (Continued)
DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - MECHANICAL
CONDITION
NOISY VALVES/LIFTERS
CONNECTING ROD NOISE
MAIN BEARING NOISE
ENGINE MECHANICAL DIAGNOSIS CHART
POSSIBLE CAUSES
1. High or low oil level in crankcase
2. Thin or diluted oil
3. Low oil pressure
4. Dirt in tappets/lash adjusters
5. Bent push rod(s)
6. Worn rocker arms
7. Worn tappets/lash adjusters
8. Worn valve guides
9. Excessive runout of valve seats or
valve faces
1. Insufficient oil supply
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
1. Insufficient oil supply
2. Low oil pressure
3. Thin or diluted oil
CORRECTION
1. Check for correct oil level. Adjust
oil level by draining or adding as
needed
2. Change oil. (Refer to 9 - ENGINE/
LUBRICATION/OIL - STANDARD
PROCEDURE)
3. Check engine oil level. If ok,
Perform oil pressure test. (Refer to 9 -
ENGINE/LUBRICATION -
DIAGNOSIS AND TESTING) for
engine oil pressure test/specifications
4. Clean/replace hydraulic tappets/
lash adjusters
5. Install new push rods
6. Inspect oil supply to rocker arms
and replace worn arms as needed
7. Install new hydraulic tappets/lash
adjusters
8. Inspect all valve guides and
replace as necessary
9. Grind valves and seats
1. Check engine oil level.
2. Check engine oil level. If ok,
Perform oil pressure test. (Refer to 9 -
ENGINE/LUBRICATION -
DIAGNOSIS AND TESTING) engine
oil pressure test/specifications
3. Change oil to correct viscosity.
(Refer to 9 - ENGINE/LUBRICATION/
OIL - STANDARD PROCEDURE) for
correct procedure/engine oil
specifications
4. 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.
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.
DR