For 1990-2009 cars

### Removal Procedure

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.
2. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement in Engine Mechanical.

Remove the timing belt from the vehicle. Refer to Timing Belt Replacement in Engine Mechanical.

3. Remove the camshaft timing belt pulley.
4. Remove the camshaft sensor from the camshaft sensor housing.

Important: In order to catch any oil, place a shop rag under the camshaft housing before removing it from the cylinder head.

5. Remove the three camshaft sensor housing bolts and the camshaft sensor housing from the cylinder head.
6. Loosen all valve adjusting screw lock nuts (2), turn adjusting screws back all the way to allow all rocker arms to move freely.
7. Gradually remove the twelve camshaft housing bolts in the sequence shown.
8. Remove the camshaft housings from the cylinder head.
9. Remove the camshaft from the cylinder head.

### Installation Procedure

1. Apply clean engine oil to the following components:

• | Cams

• | Journals

• | The oil seal

2. Install the camshaft to the cylinder head.

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.

3. After applying the engine oil to the housing bolts, tighten in the sequence shown.

Tighten
Tighten the camshaft housing bolts to 11 N·m (97 lb in).

4. After applying engine oil to the oil seal lip (1), install the camshaft oil seal (1) to the housing until the oil seal is flush with the surface of the housing.
5. Install the camshaft timing sprocket (1).
6. Perform the following procedure in order to install the camshaft timing sprocket to the camshaft.

6.1. | Install the camshaft timing sprocket to the camshaft.

6.2. | Verify that the pin on the camshaft fits the slot on the sprocket.

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.

6.3. | Use the camshaft timing sprocket bolt in order to secure the camshaft timing sprocket to the camshaft.

Tighten
Tighten the camshaft timing sprocket bolt to 60 N·m (43 lb ft).

7. Install the timing belt. Refer to Timing Belt Replacement in Engine Mechanical.
8. Perform the following steps to adjust the valve lash.

8.1. | Set the number one cylinder to top dead center.

8.2. | Ensure the camshaft is in proper phase.

8.3. | Adjust valves 1, 2, 8, and 6.

8.4. | Rotate the crankshaft one revolution (360°).

8.5. | Adjust valves 3, 4, 7, and 5.

9. Install the camshaft sensor housing to the cylinder head.

Tighten
Tighten the camshaft sensor housing bolts to 11 N·m (97 lb ft).

10. Install the cam sensor to the cam sensor housing.
11. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement in Engine Mechanical.
12. Connect the negative battery cable.