Engine Overheating
| Step | Action | Yes | No |
|---|---|---|---|
| DEFINITION: The engine temperature lamp comes on and stays on, or temperature gauge shows hot, or coolant overflows from the surge tank onto the ground while the engine is running. | |||
| 1 | Check the condenser, radiator, and auxiliary coolers for any obstructions or bent fins that would prevent air flow through the radiator. Is there any airflow obstruction or bent fins? |
Go to Step 2 | Go to Step 3 |
| 2 |
|
Go to Step 3 | System OK |
| 3 | Check for loose, missing, or damaged radiator air seals or deflectors. Are there any loose, missing, or damaged radiator air seals or deflectors? |
Go to Step 4 | Go to Step 5 |
| 4 | Repair or replace any loose, missing, or damaged radiator air seals or deflectors. Does the engine still overheat? |
Go to Step 5 | System OK |
| 5 | Check for an inoperative cooling fan. Refer to Cooling Fan Inoperative (LFX) Cooling Fan Inoperative (LEA) Is the cooling fan inoperative? |
Go to Step 6 | Go to Step 7 |
| 6 | Repair or replace the cooling fan(s) as necessary. Refer to Engine Coolant Fan Replacement (LEA) Engine Coolant Fan Replacement (LFX) Does the engine still overheat? |
Go to Step 7 | System OK |
| 7 | Check for a loss of coolant. Refer to Loss of Coolant . Does the engine still overheat? |
Go to Step 8 | System OK |
| 8 | Check for kinked or pinched cooling hoses. Are any cooling hoses kinked or pinched? |
Go to Step 9 | Go to Step 10 |
| 9 |
|
Go to Step 10 | System OK |
| 10 | Using J-26568
Coolant and Battery Fluid Tester, check the coolant concentration. Does the coolant concentration test correctly? |
Go to Step 12 | Go to Step 11 |
| 11 | Replace the coolant, if necessary. Refer to Cooling System Draining and Filling (LFX) Cooling System Draining and Filling (GE 47716) Cooling System Draining and Filling (LEA) Does the engine still overheat? |
Go to Step 12 | System OK |
| 12 | Check for any blocked cooling system passages. Are there blocked cooling system passages? |
Go to Step 13 | Go to Step 14 |
| 13 | Remove any obstructions by flushing the cooling system. Refer to Flushing Does the engine still overheat? |
Go to Step 14 | Go to Step 19 |
| 14 | Inspect the accessory drive belt tensioner. Refer to Drive Belt Tensioner Diagnosis
, for 2.4L engine and Drive Belt Tensioner Diagnosis
for 3.0L engine. Did you find and correct the condition? |
Go to Step 19 | Go to Step 15 |
| 15 | Check for a damaged thermostat. Refer to Thermostat Diagnosis Did you find and correct the condition? |
Go to Step 19 | Go to Step 16 |
| 16 | Check for a damaged water pump. The impeller blades may be eroded or broken. Is the water pump damaged? |
Go to Step 17 | Go to Step 18 |
| 17 | Replace the water pump. Refer to Water Pump Replacement (LFX) Water Pump Replacement (L4) Did you find and correct the condition? |
Go to Step 19 | Go to Step 18 |
| 18 | Replace the radiator. Refer to Radiator Replacement Did you complete the replacement? |
Go to Step 19 | - |
| 19 | Operate the system to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |