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.
2004 Chevrolet Optra (CANADA) L4-2.0LFACTORY OEM SERVICE PROCEDURE
Camshaft Position Sensor: Service and Repair
Camshaft Position Sensor Replacement
Removal Procedure
Caution: Refer to Battery Disconnect Caution Battery Disconnect Caution.
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Disconnect the sensor electrical connector.
4. Remove the timing belt front cover. Refer to Timing Belt Replacement Service and Repair.
5. Remove the camshaft position sensor bolts.
6. Remove the camshaft position sensor from the top.
Installation Procedure
Notice: Refer to Fastener Notice Fastener Notice.
1. Install the camshaft position sensor and bolts.
Tighten the camshaft position bolts to 8 Nm (71 lb in).
2. Install the timing belt front cover, the crankshaft pulley, the accessory drive belt, and the air filter.
3. Connect the sensor electrical connector.
4. Install the engine cover.
5. Connect the negative battery cable.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.