Step | Action | Values | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
DEFINITION: The engine temperature lamp comes on and stays on, the temperature gauge shows hot or coolant overflows from the coolant recovery reservoir onto the ground while the engine is running. | ||||||||
1 | Check for a loss of coolant. Has there been a loss of coolant? | -- | Go to Step 2 | Go to Step 3 | ||||
2 | Refer to Loss of Coolant . Does the engine still overheat? | -- | Go to Step 3 | System OK | ||||
3 | Use J 24460-01 Cooling System Pressure Tester to test for a loss of system pressure. Did you discover a loss of system pressure? | -- | Go to Step 4 | Go to Step 5 | ||||
4 | Correct the system pressure. Does the engine still overheat? | -- | Go to Step 5 | System OK | ||||
5 | Use J 23688 Coolant Battery Fluid Tester to inspect for low coolant protection. Is the low coolant protection at or above the specified value? | -37°C (-34°F) | Go to Step 7 | Go to Step 6 | ||||
6 | Correct as necessary. Does the engine still overheat? | -- | Go to Step 7 | System OK | ||||
7 | Check for an inoperative cooling fan. Refer to Cooling System Description and Operation . Are any of the cooling fans inoperative? | -- | Go to Step 8 | Go to Step 9 | ||||
8 | Repair or replace the electric cooling fans as necessary. Refer to Fan Shroud Replacement . Does the engine still overheat? | -- | Go to Step 9 | System OK | ||||
9 | Inspect the drive belt tensioner for proper operation. Is the tensioner working properly and is the tension correct? | -- | Go to Step 11 | Go to Step 10 | ||||
10 | Replace the tensioner as necessary. Refer to one of the following procedures:
Does the engine still overheat? | -- | Go to Step 11 | System OK | ||||
11 | Inspect the radiator fins for an obstruction. Are any of radiator fins obstructed? | -- | Go to Step 12 | Go to Step 13 | ||||
12 |
Does the engine still overheat? | -- | Go to Step 13 | System OK | ||||
13 | Inspect the cooling system passages for rust or scale. Are any of the cooling system passages blocked by rust or scale? | -- | Go to Step 14 | Go to Step 15 | ||||
14 |
Repair as necessary. Does the engine still overheat? | -- | Go to Step 15 | System OK | ||||
15 | Inspect for a pinched or a kinked hose to the coolant recovery reservoir. Is the reservoir hose pinched or kinked? | -- | Go to Step 16 | Go to Step 17 | ||||
16 | Replace or reroute the hose as necessary. Refer to Coolant Recovery Reservoir Replacement . Does the engine still overheat? | -- | Go to Step 17 | System OK | ||||
17 | Inspect for a loose, damaged or a missing deflector. Did you find any loose, damaged or missing deflectors? | -- | Go to Step 18 | Go to Step 19 | ||||
18 | Replace the deflectors. Refer to Radiator Air Lower Baffle and Deflector Replacement , to Radiator Air Side Baffle and Deflector Replacement , or to Radiator Air Upper Baffle and Deflector Replacement . Does the engine still overheat? | -- | Go to Step 19 | System OK | ||||
19 | Inspect the position of the thermostat. Refer to Thermostat Diagnosis . Is the thermostat stuck in the closed position? | -- | Go to Step 20 | Go to Step 21 | ||||
20 | Replace the thermostat. Refer to Engine Coolant Thermostat Replacement . Does the engine still overheat? | -- | Go to Step 21 | System OK | ||||
21 | Test for a faulty water pump. Is the water pump faulty? | -- | Go to Step 22 | Go to Step 23 | ||||
22 | Replace the water pump. Refer to Water Pump Replacement . Does the engine still overheat? | -- | Go to Step 23 | System OK | ||||
23 | Inspect for an incorrect radiator. Is the radiator incorrect? | -- | Go to Step 24 | -- | ||||
24 | Install the correct radiator. Refer to Radiator Replacement . Does the engine still overheat? | -- | -- | System OK | ||||
