Knock Sensor: Service and Repair

Knock Sensor (KS)













Removal and Installation

NOTICE: Early build vehicle (built before July 6, 2009) cooling systems are filled with Motorcraft(R) Premium Gold Engine Coolant. Late build vehicle (built on or after July 6, 2009) cooling systems are filled with Motorcraft(R) Specialty Green Engine Coolant. Mixing coolant types degrades the corrosion protection of the coolant. Do not mix coolant types. Failure to follow these instructions may result in engine or cooling system damage.

1. Remove the thermostat housing. For additional information, refer to Cooling System &/or Engine Block Heater.

2. Remove the lower intake manifold. For additional information, refer to Engine.

3. Remove the coolant tube.
- Discard the O-ring seal.

4. Disconnect the Knock Sensor (KS) electrical connector.

5. NOTICE: Only use hand tools when removing or installing the Knock Sensor (KS) or damage to the KS can occur.
Remove the 2 bolts and the KS.
- To install, tighten to 20 Nm (177 lb-in).

6. To install, reverse the removal procedure.
- Lubricate the new O-ring seal with clean engine coolant.