For 1990-2009 cars

1. Remove the crankshaft position sensor bolts from the engine front cover.
2. Remove the crankshaft position sensor.

Caution: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

3. Clean the engine front cover with cleaning solvent.
4. Inspect the engine front cover sealing surfaces for damage.
5. Inspect the engine front cover threaded holes.
6. Repair or replace the engine front cover as necessary.
7. Install the crankshaft position sensor to the engine front cover.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

8. Install the crankshaft position sensor bolts. Apply threadlock GM P/N United States 12345382, GM P/N Canada 10953489 or the equivalent to the threads.

Tighten
Tighten the crankshaft position sensor bolts to 10 N·m(89 lb in).