Common Radiator Failures
Solder Bloom - Solder corrosion caused by poorly inhibited antifreeze. Tube-to header joints are weakened and corrosion can restrict coolant flow.Internal Deposits - Rust and leak inhibitors can form solids that collect in the cooling system and restrict flow.
Fin Deterioration - A chemical deterioration of the fins most often caused by road salt or sea water.
Fin Bond Failure - A loss of solder bond between fins and tubes. Fins are loose in core. This causes loss of heat transfer and reduces the strength of the radiator.
Tube - to - Header Leaks - Failure of the solder joint results in coolant loss.
Leaky Tank - to - Header Seam - Failure of the solder joint or cracked headers is generally the result of pressure cycle fatigue.
Blown Tank - to - Header Seam - Usually an indication that the radiator has seen extreme pressures resulting from an exhaust gas leak into the cooling system
Loose Side Piece - Can lead to flexing of the core and radiator tube failure.
Leaky Oil Cooler Fitting - Caused by failure of the solder joint between the radiator tank and oil cooler.
Leaky Inlet / Outlet Fitting - Leaks in this area of the radiator can be caused by fatigue or by corrosion of the solder joint.
Fan Damage - Minor collisions or a failed water pump can result in damage to the radiator.
Over Pressurization - Excessive pressure in the radiator caused by a defective pressure cap or engine exhaust gas leak can destroy the radiator.
Electrolysis - Stray electrical current can cause excessive corrosion of metal components.
Cracked Plastic Tanks - High stress in the radiator can cause premature failure of the plastic tanks.
Steam Erosion - Steam can breakdown the plastic tank which will produce thinning and ultimately holes in the plastic tank. Frequently, white deposits are also found.