PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IO-G-T-00-001e B
February 2016
GAS ENGINES TROUBLESHOOTING
7/10
SYMPTOM
PROBABLE CAUSE
REMEDY
Low oil pressure
Low oil level
Fill oil sump up to the specified level
Inaccurate pressure gauge
Recalibrate or change, as appropriate, the
pressure gauge
Clogged oil filters
Change filters
Oil pressure regulating valve damaged
Change spring or piston, as the case may be
Overpressure valve open
Change overpressure valve
Damaged or faulty oil pump
Change oil pump
Oil leak
Locate and repair leak
High oil pressure
Regulating valve in bad condition
Change regulating valve
Low oil temperature
Check thermostat
Inadequate oil viscosity
Use oil to specification
Inaccurate pressure gauge
Recalibrate or change the pressure gauge
Safety valve stuck
Change safety valve
High oil temperature
Damaged thermostat
Change thermostat
Overload
Check power signal
Insufficient cooling
Clean cooler
Low oil pressure
Check regulating valve
Low oil level
Refill oil sump
Rotation of crankshaft bearings
Change crankshaft bearings
Low oil temperature
Thermostat stuck open
Change thermostat
Low temperature of oil cooler coolant
Check thermostats on water circuit
Excessive oil consumption
Oil leaks
1. Cylinder head gasket
2. Oil
cooler
3. Any point of the oil system outside the
engine
4. Crankshaft
seal
1. Change cylinder head gasket
2. Change oil cooler seals and check tube
3. Repair external leaks
4. Change crankshaft seal
Inadequate oil viscosity
Use oil of adequate viscosity
Damaged piston rings or scratched liner
Change piston rings. Grind or change the
liner according to depth of scratches
Oil contaminated with coolant.
If oil is contaminated, you must
solve the problem and then
change oil.
Scratched liner
Change liner
Cracked crankcase
Change crankcase
Cracked cylinder head
Change cylinder head
Broken cooler
Repair or change cooler
Damaged cylinder head gasket
Change cylinder head gasket
6.1.7
O&M_2.002211.810_A_10_2016