Knock Sensor: Service and Repair

Knock Sensor (KS) - 3.5L Ti-VCT

Material(s)






Exploded View

NOTE: LH (Left Hand) cylinder head is removed for clarity.










Removal

1. Remove the thermostat housing. REFER to Thermostat Housing - 3.5L Ti-VCT Service and Repair.

2. Remove the lower intake manifold. REFER to Lower Intake Manifold Lower Intake Manifold.

3. Remove the coolant tube and discard the O-ring seal.

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

5. Remove the 2 bolts and the KS (Knock Sensor).

Installation

NOTICE: Motorcraft(R) Specialty Green Engine Coolant is very sensitive to light. Do NOT allow this coolant to be exposed to ANY LIGHT for more than a day or two. Extended light exposure causes this coolant to degrade.

NOTICE: Early build vehicle cooling systems are filled with Motorcraft(R) Specialty Green Engine Coolant. Late build vehicle cooling systems are filled with Motorcraft(R) Specialty Orange Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of the coolant. Failure to follow these instructions may damage the engine or cooling system.

NOTICE: Use Motorcraft(R) Specialty Green Engine Coolant or Motorcraft(R) Specialty Orange Engine Coolant. Use the same type of coolant that was originally used to fill the cooling system. Do not mix coolant types. Failure to follow these instructions may damage the engine or cooling system.

NOTE: Install a new O-ring seal and lubricate it with clean engine coolant before installing the coolant tube.

1. Install the KS (Knock Sensor) and the 2 bolts.

- Tighten to 20 Nm (177 lb-in).

2. Connect the KS (Knock Sensor) electrical connector.

3. Install a new O-ring seal on the coolant tube.

4. NOTE: Lubricate the new O-ring seal with clean engine coolant.

Install the coolant tube.

5. Install the lower intake manifold. REFER to Lower Intake Manifold Lower Intake Manifold.

6. Install the thermostat housing. REFER to Thermostat Housing - 3.5L Ti-VCT Service and Repair.