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