Why does the coolant in Audi Q5 keep decreasing?

[AliyahRose]

Audi Q5's coolant keeps decreasing mainly due to the following three reasons. Main causes: Radiator damage, poor sealing of the upper and lower water chambers causing coolant leakage. Loose connections and poor sealing at the overflow tank, water pump joint surfaces, and various coolant system pipe fittings leading to coolant leakage. Cylinder head gasket damage, excessive flatness deviation or warping of the cylinder head and cylinder block mating surfaces, and loose cylinder head fastening bolts causing high-temperature and high-pressure gas from the cylinders to enter the cooling system, resulting in excessive coolant consumption. Solutions: Regularly inspect all sealing points and connections, ensuring proper tightening where needed. Never reuse leak-proof gaskets or sealing tapes. This not only prevents excessive coolant consumption but also effectively prevents oil line leaks and transmission oil leakage.