What Causes Engine Overheating in BMW 3 Series?

[ArianaFitz]

Here are the reasons that may cause engine overheating in BMW 3 Series cars: 1. Fan issues: The fan motor fails to operate or the fan clutch malfunctions, preventing proper cooling. 2. Exhaust problems: A blocked catalytic converter or cracked pipes can obstruct exhaust flow, leading to engine overheating. 3. Coolant leakage: If pipes in the cooling system crack and cause coolant loss, the cooling function becomes impaired; replacing the damaged pipe usually solves this issue. 4. Water pump problems: After prolonged use, highly worn water pumps may experience component wear and detachment; the only solution is to replace the water pump. 5. Radiator cap issues: If the radiator cap's pressure is inconsistent, it may cause spring loosening and prevent tight sealing. Additionally, check for external blockages in the radiator and internal buildup of scale or blockages. If external blockages restrict ventilation, use a water gun to clean them. For internal scale buildup, use appropriate methods to remove the scale.