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Home >> Mercury >> 2000 >> Cougar 2.5 L, Automatic >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System >> Heated Oxygen Sensor (Ho2S) >> Removal & Installation

Removal & Installation

Oxygen sensor is equipped with a permanent pigtail which must be protected when oxygen sensor is removed. Oxygen sensor may be difficult to remove when engine temperature is less than 120°F (48°C). If necessary use a penetrant to help in loosening oxygen sensor. Ensure oxygen sensor is free of contaminants, and avoid using cleaning solvents of any type. Always use anti-seize compound on threads prior to installation. Tighten oxygen sensor to specification. See TORQUE SPECIFICATIONS .