Step | Action | Value(s) | Yes | No | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Inspect for a loss of system pressure. Refer to Cooling System Leak Testing . Is there a loss of system pressure? | -- | ||||||||||||
2 | Inspect and repair any faulty hose connections. Does the engine still overheat? | -- | System OK | |||||||||||
3 | Inspect for low coolant protection (-37°C/-34°F). Refer to Coolant Concentration Testing . Is there low coolant protection (-37°C/-34°F)? | -- | ||||||||||||
4 | Replace the coolant. Refer to Cooling System Draining and Filling . Does the engine still overheat? | -- | System OK | |||||||||||
5 | Inspect the drive belt for excessive wear or low tension. Is the drive belt worn or is the tension too low? | -- | ||||||||||||
6 | Replace the drive belt. Refer to Drive Belt Replacement or Drive Belt Replacement in Engine Mechanical. Does the engine still overheat? | -- | System OK | |||||||||||
7 | Inspect the water pump. Is the water pump inoperative? | -- | ||||||||||||
8 | Replace the water pump. Refer to Water Pump Replacement . Does the engine still overheat? | -- | System OK | |||||||||||
9 | Inspect the radiator fins for obstruction. Are the radiator fins obstructed? | -- | ||||||||||||
10 | Inspect and clean the radiator. Refer to Radiator Cleaning . Does the engine still overheat? | -- | System OK | |||||||||||
11 | Inspect the cooling system passage for obstruction. Is the cooling system passage blocked? | -- | ||||||||||||
12 | Inspect and flush the system. Refer to Flushing . Does the engine still overheat? | -- | System OK | |||||||||||
13 | Inspect the fan clutch. Refer to Fan Clutch Diagnosis . Is the fan clutch inoperative? | -- | ||||||||||||
14 | Replace the fan clutch. Refer to Fan Clutch Replacement . Does the engine still overheat? | -- | System OK | |||||||||||
15 | Verify the thermostat operation. Refer to Thermostat Diagnosis . Is the thermostat stuck in the closed position? | -- | ||||||||||||
16 | Replace the thermostat. Refer to Engine Coolant Thermostat Replacement . Does the engine still overheat? | -- | System OK | |||||||||||
17 | Other factors, such as the following, may be causing the engine to overheat:
Correct or repair as necessary. Does the engine still overheat? | -- | -- | System OK |
