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 | Inspect for a loss of coolant. Has a loss of coolant occurred? | -- | 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 notice 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 and Battery Fluid Tester or J 26568 Coolant and Battery Fluid Tester to test 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 | Test for an inoperative cooling fan. Refer to Cooling Fan Inoperative . Did you find any inoperative cooling fans? | -- | Go to Step 8 | Go to Step 9 |
8 | Repair or replace the electric cooling fans as necessary. Refer to Engine Coolant Fan Motor Replacement . Does the engine still overheat? | -- | Go to Step 9 | System OK |
9 |
Is the tensioner working properly and is the tension correct? | -- | Go to Step 11 | Go to Step 10 |
10 | Replace the drive belt tensioner. Refer to Drive Belt Tensioner Replacement , or Drive Belt Tensioner Replacement - Accessory . Does the engine still overheat? | -- | Go to Step 11 | System OK |
11 | Test 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. Are any of the cooling system passages blocked by rust or scale? | -- | Go to Step 14 | Go to Step 15 |
14 |
Does the engine still overheat? | -- | Go to Step 15 | System OK |
15 | Inspect for a pinched or kinked coolant recovery reservoir hose. 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, and/or missing deflector. Are the deflectors loose, damaged, or missing? | -- | Go to Step 18 | Go to Step 19 |
18 | Replace the deflectors. Refer to the following procedures: Does the engine still overheat? | -- | Go to Step 19 | System OK |
19 | Inspect the thermostat. 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 | Check for an incorrect radiator. Is the radiator correct? | -- | Go to Step 1 | Go to Step 24 |
24 | Install the correct radiator. Refer to Radiator Replacement . Does the engine still overheat? | -- | Go to Step 1 | System OK |
