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 MANUALSCHEVROLET1998EXPRESS 1 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSKNOCK SENSORSERVICE AND REPAIR
1998 Chevrolet Express 1 Ton Van V8-5.7L VIN R
Knock Sensor: Service and Repair
1998 Chevrolet Express 1 Ton Van V8-5.7L VIN RSECTION Service and Repair
Diagram:
REMOVAL PROCEDURE
NOTE: The knock sensor is located in areas of the cylinder head. On most applications, the knock sensors are installed in a hole which is exposed to engine coolant. Care should be exercised when servicing these sensors.
1. Disconnect the negative battery cable.
IMPORTANT: On knock sensors which are mounted in the end of the cylinder head draining the cooling system will not be necessary.
2. Drain the cooling system. Refer to Draining and Filling Cooling System.
3. Remove the wiring harness connector from knock sensor.
4. Remove the knock sensor from cylinder block.
INSTALLATION PROCEDURE
IMPORTANT: Do not use silicon tape as this will insulate the sensor from the engine block.
2. After applying a water base caulk to the sensor threads, install the knock sensor into the cylinder block.
Tighten
^ Tighten to 19 Nm (14 lb. ft.).
2. Connect the negative battery cable.
3. Refill cooling system if required. Refer to Draining and Filling Cooling System.
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.