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.
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HOMESERVICE MANUALSFORD2012EXPLORER FWD V6-3.5LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSKNOCK SENSORSERVICE AND REPAIR
2012 Ford Explorer FWD V6-3.5L
Knock Sensor: Service and Repair
2012 Ford Explorer FWD V6-3.5LSECTION 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 .
2. Remove the lower intake manifold. REFER to 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
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 .
6. Install the thermostat housing. REFER to Thermostat Housing - 3.5L Ti-VCT .
RENDER: 1.0x
NO RELATED
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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.