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Cooling Service Diagnosis - CJ-5
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| Symptoms | Possible Solution: |
|---|---|
| Overheating: | |
| Lack of coolant | Refill radiator |
| Thermostat inoperative | Replace |
| Water pump inoperative | Overhaul or replace |
| Incorrect ignition or valve timing | Set timing |
| Excessive piston blowby | Check pistons, rings and cylinder walls |
| Fan belt broken | Replace |
| Radiator clogged | Reverse flush |
| Air passages in core clogged | Clean with water and air pressure |
| Excessive carbon formation | Remove |
| Muffler clogged or bent exhaust pipe | Replace |
| Loss of Cooling Liquid: | |
| Loose hose connections | Tighten |
| Damaged hose | Replace |
| Leaking water pump | Replace |
| Leak in radiator | Remove and repair |
| Leaky cylinder head gasket | Replace |
| Crack in cylinder block or cylinder head | Small crack can be closed with Radiator Scaler |
* Excerpt from the Service Manual for Universal Jeep Vehicles page 110
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