Troubleshooting Chart
| Symptom | Check items | |||
|---|---|---|---|---|
| Cooling system parts malfunction | Poor heat transfer | Water pump malfunction | Worn or loose drive belt | |
| Thermostat stuck closed | ||||
| Damaged fins | Dust contamination or paper clogging | |||
| Physical damage | ||||
| Clogged radiator cooling tube | Excess foreign material (rust, dirt, sand, etc.) | |||
| Reduced air flow | Cooling fan does not operate | Fan assembly | ||
| High resistance to fan rotation | ||||
| Damaged fan blades | ||||
| Damaged radiator shroud | Radiator shroud | |||
| Improper coolant mixture ratio | Coolant viscosity | |||
| Poor coolant quality | ||||
| Insufficient coolant | Coolant leaks | Cooling hose | Loose clamp | |
| Cracked hose | ||||
| Water pump | Poor sealing | |||
| Radiator cap | Loose | |||
| Poor sealing | ||||
| Radiator | O-ring for damage, deterioration or improper fitting | |||
| Cracked radiator tank | ||||
| Cracked radiator core | ||||
| Reservoir tank | Cracked reservoir tank | |||
| Overflowing reservoir tank | Exhaust gas leaks into cooling system | Cylinder head deterioration | ||
| Cylinder head gasket deterioration | ||||
| Except cooling system parts malfunction | Overload on engine | Abusive driving | High engine RPM under no load | |
| Driving in low gear for extended time | ||||
| Driving at extremely high speed | ||||
| Powertrain system malfunction | ||||
| Installed improper size wheels and tires | ||||
| Dragging brakes | ||||
| Improper ignition timing | ||||
| Blocked or restricted air flow | Blocked bumper | Blocked air flow | ||
| Blocked radiator grille | Installed car brassiere | |||
| Mud contamination or paper clogging | ||||
| Blocked radiator | Blocked air flow | |||
| Blocked condenser | ||||
| Installed large fog lamp | ||||
TROUBLESHOOTING CHART
Scheme 1
Scheme 2
System Inspection
| WARNING | Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly push down and turn it a quarter turn to allow built-up pressure to escape. Carefully remove the cap by pushing down and turning it all the way. |
INSPECTION
Radiator
Scheme 3
Scheme 4
- Check radiator for mud or clogging. If necessary, clean radiator as follows: Be careful not to bend or damage the radiator fins. When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator shroud and horns. Then tape the harness and electrical connectors to prevent water from entering. Apply water by hose to the back side of the radiator core, point the hose vertically downward. Apply water again to all radiator core surfaces once per minute. Stop washing when no more dirt flows off the radiator. Blow air into the back side of radiator core, point the air hose vertically downward. Use compressed air lower than 490 kPa (5 kg/cm 2 , 71 psi) and keep distance more than 30 cm (11.8 in). Blow air again into all the radiator core surfaces once per minute until no water sprays out.
- Inspect radiator for leaks as follows: Apply pressure using Tool. Tool number : EG17650301 (J-33984-A) Specified pressure value : 157 kPa (1.6 kg/cm 2 , 23 psi) WARNING: To prevent the risk of the hose coming undone while under pressure, securely fasten it down with a hose clamp. Attach a hose to the oil cooler as well. Check for leakage.
