Dodge dakota 2002 Service Manual page 1533

9 - 284 ENGINE 5.9L DIESEL
ENGINE 5.9L DIESEL (Continued)
CONDITION
LUBRICATING OIL LOSS
COMPRESSION KNOCKS
EXCESSIVE VIBRATION
EXCESSIVE ENGINE
NOISES
POSSIBLE CAUSES
1. External leaks.
2. Crankcase being overfilled.
3. Incorrect oil specification or
viscosity.
4. Oil cooler leak
5. High blow-by forcing oil out the
breather.
6. Turbocharger leaking oil to the air
intake.
1. Air in the fuel system.
2. Poor quality fuel or water/gasoline
contaminated fuel.
3. Engine overloaded.
4. Improperly operating injectors.
1. Loose or broken engine mounts.
2. Damaged fan or improperly
operating accessories.
3. Improperly operating vibration
damper
4. Improperly operating electronically
controlled viscous fan drive.
5. Worn or damaged generator
bearing.
6. Flywheel housing misaligned.
7. Loose or broken power
component.
8. Worn or unbalanced driveline
components.
1. Drive belt squeal, insufficient
tension or abnormally high loading.
2. Intake air or exhaust leaks.
CORRECTION
1. Visually inspect for oil leaks. Repair as
required.
2. Verify that the correct dipstick is being
used.
3. (a) Make sure the correct oil is being
used (Refer to LUBRICATION &
MAINTENANCE/FLUID TYPES -
DESCRIPTION).
(b) Look for reduced viscosity from dilution
with fuel.
(c) Review/reduce oil change intervals.
4. Check and replace the oil cooler.
5. Check the breather tube area for signs of
oil loss. Perform the required repairs.
6. Inspect the air ducts for evidence of oil
transfer. Repair as required.
1. Identify location of air leak and repair. Do
not bleed high pressure fuel system.
2. Verify by operating from a temporary
tank with good fuel. Clean and flush the
fuel tank. Replace fuel/water separator filter.
3. Verify the engine load rating is not being
exceeded.
5. Check and replace misfiring/inoperative
injectors.
1. Replace engine mounts.
2. Check and replace the vibrating
components.
3. Inspect/replace vibration damper.
4. Inspect/replace fan drive.
5. Check/replace generator.
6. Check/correct flywheel alignment.
7. Inspect the crankshaft and rods for
damage that causes an unbalance
condition. Repair/replace as required.
8. Check/repair driveline components.
1. Check the automatic tensioner and
inspect the drive belt. Make sure water
pump, tensioner pulley, fan hub, generator
and power steering pump turn freely.
2. Refer to Excessive Exhaust Smoke
(Refer to 9 - ENGINE - DIAGNOSIS AND
TESTING).
DR