Troubleshooting - Doosan G424FE Service Manual

Troubleshooting

Symptom
Low compression
Low oil pressure
High oil pressure
Noisy valve
Noisy connecting rod
or timing belt
Noisy timing belt
Low coolant level
Radiator clogged
Abnormally high
coolant temperature
Abnormally low
coolant temperature
Oil cooling system
leak
Exhaust gas leak
Abnormal noise
G424F(FE) Service Manual
Possible cause
Cylinder head gasket damaged
Worn or damaged piston ring
Worn piston or cylinder
Worn or damaged valve seat
Insufficient engine oil
Oil pressure switch defective
Oil filter clogged
Worn oil pump gear or cover
Thin or diluted engine oil
Oil relief valve clogged(Open)
Excessive bearing clearance
Oil relief valve clogged(Closed)
Thin or diluted engine oil
Faulty HLA
Worn belt stem or valve guide
Insufficient engine oil
Low oil pressure
Thin or diluted engine oil
Excessive bearing clearance
Incorrect belt tension
Coolant leak from Heater or radiator
hose
Defective radiator cap
Thermostat housing
Radiator
Water pump
Foreign material into coolant
Thermostat defective
Radiator cap defective
Abnormal flow in cooling system
Loose or missing driving belt
Loose water pump
Water temperature wiring defective
Cooling pan defective
Radiator or thermostat switch defective
Inefficient coolant
Thermostat defective
Water wiring defective
Loose connecting part
Cracked or damaged hose, pipe, and oil
cooler
Loose connecting part
Pipe or muffler damaged
Breakaway exhaust plate in muffler
Rubber hanger damaged
Pipe or muffler with body Interfered
Pipe or muffler damaged
Catalytic converter damaged
Each connecting gasket damaged
Replace gasket
Replace ring
Repair or replace piston and cylinder block
Repair or replace valve and seat ring
Check engine oil level
Replace oil pressure switch
Install new filter
Replace
Replace engine oil
Replace or inspect
Replace bearing
Repair relief valve
Replace engine oil
Replace HLA
Replace belt stem or valve guide
Check engine oil level
Refer to too low oil pressure
Replace engine oil
Replace bearing
Correct belt tension
Repair or replace parts
Retighten clamp or replace
Replace gasket or housing
Replace
Replace parts
Replace coolant
Replace parts
Replace parts
Clean or replace parts
Correct or replace
Replace
Repair or replace
Repair or replace
Replace
Add coolant
Replace
Repair or replace
Retighten Replace
Retighten
Repair or replace
Replace
Replace
Repair
Repair or replace
Replace
Replace
38 Chapter 3. Engine Mechanical System
Remedy