Common Radiator Problems

1. Solder Bloom:

Solder corrosion caused by degradation of rust and leak inhibitors in antifreeze. Tube to header joints are weakened and corrosion can restrict coolant flow.

2. Internal Deposits:

Rust and leak inhibitors can form solids that collect in the cooling system and restrict flow.

3. Fin Deterioration:

A chemical deterioration of the fins most often caused by road salt or sea water. 

4. Fin Bond Failure:

A loss of solder bond between fins and tubes. Fins are loose in core causing loss of heat transfer and reducing radiator strength.

5. Tube-To-Header Leaks:

Failure of the solder joint results in coolant loss.

6. Leaky Tank-To-Header Seam:

Solder joint failure or a cracked header is generally the result of pressure-cycle fatigue.

7. Blown Tank-To-Header Seam:

8. Loose Side Piece:

Can lead to flexing of the core and radiator tube failure

9. Blown Tank-To-Header Seam:
 

Coolant shows traces of oil. Transmission or engine damage can result from the mixing of coolant with transmission fluid or engine oil. 

10. Blown Tank-To-Header Seam:
 

Leaks in this area can be caused by fatigue or solder joint corrosion. 

11. Fan Damage:
 

A minor collision or a failed water pump can result in radiator damage

12. Over Pressurization:
 

Excessive pressure in the radiator caused by a defective pressure cap or engine exhaust leak can destroy the radiator

13. Electrolysis:

Stray Electrical current can cause excessive corrosion of metal components  

14. Electrolysis:

Stray electrical current can cause an electrochemical reaction that will produce voids in tubes.

15. Cracked Plastic Tanks: