The composite thermostat housing and water pump crossover pipe on MINI N18 and B48 engines fail prematurely from rapid thermal expansion under stop-and-go driving. Severe ambient heat combined with zero air-wash idling degrades glass-filled polyamide plastics, producing micro-fractures, coolant weeping, and catastrophic pressure loss. Mira Vista Traffic and MINI Heat Failures  Commuting daily down Bryant […]

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