KRYOTEC ENGINE 10 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.
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