Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
DEFINITION: The temperature gauge shows hot or coolant overflows from the coolant recovery reservoir while the engine is running. | ||||||||
1 | Check for a loss of coolant. Has there been a loss of coolant? | -- | ||||||
2 | Refer to Loss of Coolant . Does the engine still overheat? | -- | System OK | |||||
3 | Check for a loss of system pressure.
Has there been a loss of system pressure? | -- | ||||||
4 | Correct the system pressure. Does the engine still overheat? | -- | System OK | |||||
5 | Check for weak engine coolant. Refer to Coolant Concentration Testing . Is there low coolant protection? | -37°C (-34°F) | ||||||
6 | Correct as necessary. Does the engine still overheat? | -- | System OK | |||||
7 |
Is the tensioner working properly and the tension correct? | -- | ||||||
8 | Replace the tensioner as necessary. Refer to Drive Belt Tensioner Replacement in Engine Mechanical. Does the engine still overheat? | -- | System OK | |||||
9 | Check to see if any of the radiator fins are obstructed. Are any of radiator fins obstructed? | -- | ||||||
10 |
Does the engine still overheat? | -- | System OK | |||||
11 | Check to see if any of the cooling system passages are blocked by rust or scale. Are any of the cooling system passages blocked by rust or scale? | -- | ||||||
12 |
Does the engine still overheat? | -- | System OK | |||||
13 | Check for a pinched or kinked coolant recovery reservoir hose. Is the reservoir hose pinched or kinked? | -- | ||||||
14 | Replace or reroute the hose as necessary. Refer to Coolant Recovery Reservoir Replacement . Does the engine still overheat? | -- | System OK | |||||
15 | Check for an inoperative cooling fans. Refer to Electric Cooling Fan Diagnosis in Engine Controls. Are there any inoperative cooling fans? | -- | ||||||
16 | Repair or replace the electric cooling fans as necessary. Refer to Engine Cooling Fan Replacement . Does the engine still overheat? | -- | System OK | |||||
17 | Check for a loose, damaged, and/or missing deflector. Are there any loose, damaged, or missing deflectors? | -- | ||||||
18 | Replace the deflectors. Does the engine still overheat? | -- | System OK | |||||
19 | Check to see if the thermostat is stuck in the closed position. Is the thermostat stuck in the closed position? | -- | ||||||
20 | Replace the thermostat. Refer to Engine Coolant Thermostat Replacement . Does the engine still overheat? | -- | System OK | |||||
21 | Check for a faulty water pump. Is the water pump faulty? | -- | ||||||
22 | Replace the water pump. Refer to Water Pump Replacement . Does the engine still overheat? | -- | System OK | |||||
23 | Check for an incorrect radiator. Is the radiator correct? | -- | -- | |||||
24 | Install the correct radiator. Refer to Radiator Replacement . Does the engine still overheat? | -- | -- | System OK | ||||
