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• 20:42, 6 July 2026 Cliff talk contribs created page Thermostat (Created page with "'''Thermostat''' refers to the coolant thermostat used in the Pontiac Fiero Cooling system. The thermostat helps control engine warm-up and operating temperature by regulating coolant flow through the cooling system. == Overview == The Fiero thermostat is part of the engine cooling system. It remains closed or mostly closed when the engine is cold, helping the engine warm up more quickly. As coolant temperature rises, the thermostat opens and allows coolant to...")