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KRYOTEC ENGINE
11
2. TROUBLESHOOTING
ENGINE DIAGNOSIS MECHANICAL
CONDITION
POSSIBLE CAUSES
CORRECTION
LUBRICATING
OIL PRESSURE
LOW
1. Low oil level.
1. (a) Check and fill with clean engine oil.
(b) Check for a severe oil leak, worn rings (burning
oil), oil leaking from the turbocharger to the intake,
or other root causes for low Oil level.
2. Oil viscosity thin, diluted or
wrong specification.
2. (a) Verify the correct engine oil is being used.
(b) Look for reduced viscosity from fuel dilution.
3.
Improperly operating
pressure switch/gauge.
3. Verify the pressure switch is functioning correctly.
If not, replace switch/gauge.
4. Relief valve stuck open.
4. Check/replace valve.
5. If cooler was replaced,
shipping plugs may have been
left in cooler
5. Check/remove shipping plugs.
6. Worn oil pump.
6. Check and replace oil pump.
7. Suction tube loose or seal
leaking.
7. Check and replace seal.
8. Loose main bearing cap.
8. Check and install new bearing. Tighten cap to
proper torque.
9. Worn bearings or wrong
bearings installed.
9. Inspect and replace connecting rod or main
bearings. Check and replace directed piston cooling
nozzles.
10. Directed piston cooling
nozzles under piston, bad fit into
main carrier.
10. Check directed piston cooling nozzles position.
11. Loose directed piston
cooling nozzle.
11. Tighten directed piston cooling nozzle.
LUBRICATING
OIL PRESSURE
TOO HIGH
1. Pressure switch/gauge not
operating properly.
1. Verify pressure switch is functioning correctly. If
not, replace switch/gauge.
2. Engine running too cold.
2. Coolant Temperature Below Normal
3. Oil viscosity too thick.
3. Make sure the correct oil is being used.
4. Oil pressure relief valve stuck
closed or binding
4. Check and replace valve.
LUBRICATING
OIL LOSS
1. External leaks.
1. Visually inspect for oil leaks. Repair as required.
2. Crankcase overfilled.
2. Verify that the correct dipstick is being used.
3. Incorrect oil specification or
viscosity.
3. (a) Make sure the correct oil is being used
(b) Look for reduced viscosity from dilution with fuel.
(c) Review / reduce oil change intervals.
4. Oil cooler leak
4. Check and replace the oil cooler.
5. High blow-by forcing oil out
the breather.
5. Check the breather tube area for signs of oil loss.
Perform the required repairs.