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Problem |
|
Symptom |
|
What To Do |
|
 |
| |
1. Insufficient Coolant |
|
Temperature warning light goes on. |
|
Check coolant level. Fill to proper level with 50/50 coolant mixture. |
|
|
| 2. Dirty or rusty coolant |
Rust or sediment in coolant sample. |
Flush cooling system. Fill with fresh 50/50 coolant mixture. |
|
| 3. Hose deterioration |
Spongy or swollen hoses. Very hard hoses. Hoses swollen or cracked around hose clamps. |
Replace hoses. Replace frozen or bent clamps. |
|
| 4. Thermostat stuck in open position; opening too soon. |
Heater delivers cool air. Engine heats up too slowly. |
Check thermostat. Replace if hung open or opening too soon. |
|
| 5. Worn fan belt |
Cracks or fraying on inside of belt. Car may overheat due to slippage of belt. |
Check fan belt and other drive belts. Replace those that are worn. Check all belts for proper tension. |
|
| 6. Sludge or rust in radiator |
Engine overheats. Sludge or rust visible through radiator filler neck. |
Clean Radiator Cleaner. If car is older than 7 years, may need to replace radiator. |
|
| 7. Coolant Overflow |
Coolant overflows through overflow pipe. |
Check pressure cap. Replace if necessary. |
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