Leaks due to faults on the fluid pump

Information on diagnostics

What can happen if too little coolant is in the cooling circuit (also known as refrigeration system)? Is there a risk of overheating or even an engine fault if the cooling water is dirty? What do squeaking noises and other indications of faults on the coolant agent pump in the vehicle mean? All of these points described can result in defective gaskets and premature failure of the engine fluid pump. You can find further causes of leaks or wear in this article.

The sliding ring seal is normally damaged by dry running of the water pump (lack of cooling liquid) and due to polluted cooling liquid. Both issues lead to abrasive seal wear and premature failure of the water pump.

Causes of leakage:

Operation of the water pump without cooling liquid.
Contaminated cooling liquid (rust, corrosion products, lime, liquid sealant, oil, sand, etc.).
Turning the new water pump by hand (damaging the sliding ring seal). The sliding ring seal, which is still dry, starts making a squeaking noise. The longer the pump shaft is turned back and forth, the louder the squeaking becomes.
Use of incorrect, corrosive or unsuitable cooling liquid.
Impacts on the pump shaft (sliding ring seal fracture due to vehicle accident or inexpert installation).
Pump bearing worn-out.
Use of radiator sealant additives in the cooling liquid (sliding ring seals are stuck).