Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Mercury Milan AWD V6-3.0LFACTORY OEM SERVICE PROCEDURE
Knock Sensor: Service and Repair
Knock Sensor (KS)
Cylinder-Head Mounted Knock Sensor (KS)
Cylinder-Block Mounted Knock Sensor (KS)
Removal
Cylinder head-mounted
1. Disconnect the Knock Sensor (KS) electrical connector.
2. Remove the bolt and the KS.
Engine block-mounted
3. Remove the lower intake manifold. For additional information, refer to Engine - 3.0L (4V) Lower Intake Manifold.
4. Disconnect the KS electrical connector.
5. Remove the bolt and the KS.
Installation
Engine block-mounted
1. Install the KS and the bolt.
- To install, tighten to 25 Nm (18 lb-ft).
2. Connect the KS electrical connector.
3. Install the lower intake manifold. For additional information, refer to Engine - 3.0L (4V) Lower Intake Manifold.
Cylinder head-mounted
4. Install the KS and the bolt.
- To install, tighten to 25 Nm (18 lb-ft).
5. Connect the KS electrical connector.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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