F 150 4WD Pickup V8-281 4.6L VIN W EFI (1997)
Radiator Coolant Recovery Reservoir: Description and Operation
The radiator coolant recovery reservoir:
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Pressure is held by the radiator cap.
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Allows air to escape from the coolant.
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Is an expansion tank for hot coolant.
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Is mounted in the left front of the engine compartment. Is the fill point for the cooling system.