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 MANUALSCHEVROLET1992BLAZER FULL SIZE V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMKNOCK SENSORSERVICE AND REPAIR
1992 Chevrolet Blazer Full Size V8-350 5.7L
Knock Sensor: Service and Repair
1992 Chevrolet Blazer Full Size V8-350 5.7LSECTION Service and Repair
REMOVE OR DISCONNECT
- Negative battery cable.
- Drain cooling system.
NOTE On knock sensors which are mounted in the end of the cylinder head draining the cooling system will not be necessary.
- Wiring harness connector from knock sensor.
- Knock sensor.
INSTALL OR CONNECT
- Knock sensor. If reinstalling original sensor, apply water base caulk to sensor threads. Do NOT use silicone tape as this will insulate sensor from engine.
^ Tighten to 19 Nm (14 lb. ft.).
- Wiring harness connector to knock sensor.
- Refill cooling system and pressure test for leaks.
- Negative battery cable.
- Negative battery cable.
- Drain cooling system.
NOTE On knock sensors which are mounted in the end of the cylinder head draining the cooling system will not be necessary.
- Wiring harness connector from knock sensor.
- Knock sensor.
INSTALL OR CONNECT
- Knock sensor. If reinstalling original sensor, apply water base caulk to sensor threads. Do NOT use silicone tape as this will insulate sensor from engine.
^ Tighten to 19 Nm (14 lb. ft.).
- Wiring harness connector to knock sensor.
- Refill cooling system and pressure test for leaks.
- Negative battery cable.
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.