Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Check for a loss of system pressure. Is there a loss of system pressure? | -- | ||
2 | Inspect and repair any faulty hose connections. Does the engine still overheat? | -- | System OK | |
3 | Check for low coolant protection (-37°C/-34°F). Is there low coolant protection (-37°C/-34°F)? | -- | ||
4 | Test solution. Replace the coolant if necessary. Does the engine still overheat? | -- | System OK | |
5 | Check the water pump belt for low tension. Is the water pump belt tension too low? | -- | ||
6 | Replace the water pump belt tensioner. Does the engine still overheat? | -- | System OK | |
7 | Check for an inoperative thermostat bypass. Is the thermostat bypass inoperative? | -- | ||
8 | Replace the bypass. Does the engine still overheat? | -- | System OK | |
9 | Check the water pump. Is the water pump inoperative? | -- | ||
10 | Replace the water pump. Does the engine still overheat? | -- | System OK | |
11 | Check the radiator fins for obstruction. Are the radiator fins obstructed? | -- | ||
12 | Inspect and clean the radiator fans. Does the engine still overheat? | -- | System OK | |
13 | Check the cooling system passage for obstruction. Is the cooling system passage blocked? | -- | ||
14 | Inspect and flush the system. Reroute or replace the hose if necessary. Does the engine still overheat? | -- | System OK | |
15 | Check the water pump belt for damage. Is the water pump belt damaged? | -- | ||
16 | Replace the water pump belt. Does the engine still overheat? | -- | System OK | |
17 | Check the cooling fans. Are the cooling fans inoperative? | -- | ||
18 | Inspect the electrical connector. Replace if necessary. Does the engine still overheat? | -- | System OK | |
19 | Check the throttle body circuit flow. Is the throttle body circuit flow restricted? | -- | ||
20 | Inspect the orifice and associated hose. Replace if necessary. Does the engine still overheat? | -- | System OK | |
21 | Check for a stuck thermostat. Is the thermostat stuck in the closed position? | -- | -- | |
22 | Replace the thermostat. Does the engine still overheat? | -- | -- | System OK |
