Why does the radiator keep losing water with small bubbles?
2 Answers
The reasons for the radiator losing water with small bubbles are as follows: Water pipe issues: Leakage at pipe joints or the pipe itself, replace the pipe or reinforce the seal. Cylinder block issues: Cracks in the cylinder block, cylinder head gasket not tight or damaged, causing water leakage. Cooling issues: Damage or pinholes in the oil cooler seal, leading to water leakage. After the radiator boils, poor engine cooling and excessive temperature cause parts to expand, reducing the clearance between components. Additionally, high temperature reduces oil viscosity, increasing wear on parts. If not addressed immediately, the engine may overheat, leading to severe mechanical damage.
Small bubbles in the radiator and constant water loss? I've encountered this issue many times. Most likely, it's a problem with the engine cylinder head gasket, where combustion chamber pressure leaks into the cooling system, creating bubbles that carry away water through evaporation. Alternatively, the radiator cap might not be sealing properly, failing to maintain internal pressure, causing the water to boil and bubble. Water loss could also be due to aging hoses leaking or loose water pump connections. The checking method is simple: when the engine is cold, open the cap to check the fluid level, and after starting, observe if bubbles emerge. I recommend performing a pressure test to pinpoint the leak. Don't underestimate this issue; prolonged water loss can lead to engine overheating and severe damage to the head gasket, which is costly to repair. For safety, don't delay too long—take it to a professional repair shop promptly. They can thoroughly diagnose and fix the problem, preventing a breakdown on the road.
