For 1990-2009 cars

## Valve Stem Oil Seal and Valve Spring Replacement Intake

### Removal Procedure

#### Tools Required

• | J 36588 Valve Spring Compressor T-Bolt

• | J 5892-D Valve Spring Depressor

• | J 36011 Spark Plug Connector Assembly Remover

• | J 36017 Valve Guide Seal Remover

• | J 36660-A Torque Angle Meter

Important: Any time the camshaft housing to the cylinder head bolts are loosened or removed, the camshaft housing to the cylinder head gasket must be replaced.

1. Disconnect the negative battery cable. Refer to

   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.

   in General Information.
2. Disconnect the ignition coil and module assembly electrical connections.
3. Remove the ignition coil and module assembly to the camshaft housing bolts. Remove the assembly by pulling straight up. Use the J 36011 in order to remove the connector assembly if it is stuck to the spark plugs. Use the tool by first twisting then pulling up on the connector assembly.
4. Remove the camshaft position sensor connector.
5. Remove the power steering pump. Refer to SECTION 3B1.
6. Disconnect the vacuum line from the fuel pressure regulator and the fuel injector harness connector.
7. Remove the fuel line retaining clamp from the bracket on top of the intake camshaft housing.
8. Remove the fuel rail to the camshaft housing retaining bolts.
9. Remove the fuel rail from the cylinder head.
10. Cover the injector openings in the cylinder head.
11. Cover the injector nozzles.
12. Leave the fuel lines attached and position the fuel rail aside (on top of the master cylinder).
13. Disconnect the timing chain housing at the intake camshaft housing but do not remove from the vehicle. Refer to Timing Chain Housing Replacement .
14. Remove the camshaft to cylinder head retaining bolts.

Notice: Turn the camshaft housing upside down as soon as it is removed from the cylinder head. The lifters will fall out of the camshaft housing if it is not turned upside down. the lifters can be damaged if they fall out and hit a hard surface.

Important: Use the reverse of the tightening procedure when loosening the camshaft housing to the cylinder head retaining bolts.

15. Remove the camshaft housing.
16. Remove the camshaft housing gasket.
17. Remove the spark plug.
18. Using a suitable adapter, apply air pressure to the cylinder.
19. Compress the valve spring. Use the J 5892-D and the J 36588 .
20. Disassemble the following components:

• | The valve keys

• | The retainer

• | The spring

• | The valve seal using J 36017

• | The rotator (intake)

• | The valve spring seat (exhaust)

21. Assemble the following components:

• | The rotator (intake)

• | The valve spring seat (exhaust)

• | A new, clean and dry valve seal. Push the seal on by hand in order to ensure that the seal is fully seated.

• | The spring and retainer. Use the J 5892-D , and the J 36588 in order to compress the valve spring.

• | The valve keys.

22. Inspect for proper valve key seating.

### Installation Procedure

1. Remove air line adapter.
2. Install the spark plug.

Notice: Carefully roll the camshaft housing right side up as it is installed onto the cylinder head. The lifters can be damaged if they fall out and hit a hard surface.

3. Install the camshaft housing.
4. Install the camshaft housing gasket.
5. Apply Pipe Sealant GM P/N 1052080 or equivalent to the camshaft housing retaining bolt threads.
6. Install the camshaft housing bolts.
7. Using the J 36660-A , install the bolts in sequence.

Tighten
Tighten the bolts to 15 N·m (11 lb ft) + 90 degrees.

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 timing chain housing and the timing chain. Refer to Timing Chain Housing Replacement .
9. Uncover the fuel injectors.
10. Install new injector O ring seals.

Lubricate the O ring seals with engine oil.

11. Uncover the injector openings in the cylinder head and install the fuel rail onto the cylinder head.
12. Install the fuel rail to the camshaft housing bolts.

Tighten
Tighten the bolts to 26 N·m (19 lb ft).

13. Connect the fuel line retaining clamp and the retainer to the bracket on top of the camshaft housing.
14. Connect the vacuum line to the fuel pressure regulator.
15. Install the fuel injector harness connector.
16. Install the camshaft position sensor connector.

Important: When reinstalling the power steering pump, apply a 3 mm bead of GM P/N 12346286 sealer or equivalent to the joint at the end of the camshaft housing halves before installation of the power steering pump and the pump face seal.

17. Install the power steering pump assembly. Refer to SECTION 3B1.
18. Reinstall any spark plug boot connector assembly that stuck to a spark plug back onto the ignition coil and module assembly.
19. Place the ignition coil and module assembly over the spark plugs and push straight down.
20. Clean any lubricant that is present on the ignition coil and module assembly to the camshaft housing bolts.
21. Apply Pipe Sealant GM P/N 1052080 or equivalent onto the ignition coil and module cover assembly to the camshaft housing bolts.

Tighten
Tighten the bolts to 15 N·m (11 lb ft) + 30 degrees.

22. Connect the electrical connector to the ignition coil and module assembly.
23. Connect the negative battery cable.

## Valve Stem Oil Seal and Valve Spring Replacement Exhaust

### Removal Procedure

#### Tools Required

• | J 36588 Valve Spring Compressor T-Bolt

• | J 5892-D Valve Spring Depressor

• | J 36011 Spark Plug Connector Assembly Remover

• | J 36017 Valve Guide Seal Remover

• | J 36660-A Torque Angle Meter

Important: Any time the camshaft housing to the cylinder head bolts are loosened or removed, the camshaft housing to the cylinder head gasket must be replaced.

1. Disconnect the negative battery cable. Refer to

   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.

   in General Information.
2. Disconnect the ignition coil and module assembly electrical connections.
3. Remove the ignition coil and module assembly to the camshaft housing bolts.
4. Remove the assembly by pulling straight up.
5. Use the J 36011 in order to remove the connector assembly if the connector assembly is stuck to the spark plugs.
6. Use the tool by first twisting then pulling up on the connector assembly.
7. Disconnect the electrical connection from the oil pressure switch.
8. Remove the transmission fluid level indicator tube assembly from the exhaust camshaft cover and position aside (automatic transmission only).
9. Disconnect the timing chain housing at the exhaust camshaft housing, but do not remove it from the vehicle. Refer to Timing Chain Housing Replacement .

Notice: Turn the camshaft housing upside down as soon as it is removed from the cylinder head. The lifters will fall out of the camshaft housing if it is not turned upside down. the lifters can be damaged if they fall out and hit a hard surface.

Important: Use the reverse of the tightening procedure when loosening the camshaft housing to the cylinder head retaining bolts.

10. Remove the exhaust camshaft housing to the cylinder head bolts.
11. Remove the exhaust camshaft housing.
12. Remove the camshaft housing gasket.
13. Remove the spark plug.
14. Using a suitable adapter, apply air pressure to the cylinder.
15. Compress the valve spring. Use the J 5892-D and the J 36588 .
16. Disassemble the following components:

• | The valve keys

• | The retainer

• | The spring

• | The valve seal using J 36017

• | The rotator (intake)

• | The valve spring seat (exhaust)

17. Assemble the following components:

• | The rotator (intake)

• | The valve spring seat (exhaust)

• | A new, clean and dry valve seal. Push the seal on by hand in order to ensure that the seal is fully seated.

• | The spring and retainer. Use the J 36588 , and the J 5892-D in order to compress the valve spring.

• | The valve keys.

18. Inspect for proper valve key seating.

### Installation Procedure

1. Remove the air line adapter.
2. Install the spark plug.

Notice: Carefully roll the camshaft housing right side up as it is installed onto the cylinder head. The lifters can be damaged if they fall out and hit a hard surface.

3. Install the exhaust camshaft housing.
4. Apply Pipe Sealant GM P/N 1052080 or equivalent to the camshaft housing retaining bolt threads.
5. Use the J 36660-A in order to install the bolts. Install the bolts in sequence.

Tighten
Tighten the bolts to 15 N·m (11 lb ft) plus 90 degrees.

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. Install the timing chain housing to the camshaft housing and timing chain. Refer to Timing Chain Housing Replacement .
7. Install the transmission fluid level indicator tube assembly to the exhaust camshaft cover.
8. Connect the electrical connection to the oil pressure switch.
9. Reinstall any spark plug boot connector assembly that stuck to a spark plug, back onto the ignition coil and module assembly.
10. Place the ignition coil and module assembly over the spark plugs and push straight down.
11. Clean any lubricant that is present on the ignition coil and module assembly to the camshaft housing bolts.
12. Apply Pipe Sealant GM P/N 1052080 or equivalent onto the ignition coil and module assembly to the camshaft housing bolts.
13. Install the ignition coil and module assembly to the camshaft housing bolts.

Tighten
Tighten the bolts to 15 N·m (11 lb ft) plus 30 degrees.

14. Connect the electrical connector to the ignition coil and module assembly.
15. Connect the negative battery cable.