For 1990-2009 cars

#### Special Tools

EN 46105 Camshaft Locking Tool

### Removal Procedure

1. Remove the bank 2 cylinder head cover. Refer to Camshaft Cover Replacement - Left Side .
2. Remove the bank 2 cylinder head camshaft position actuators.

Important: Install the EN 46105 as part of the bank 2 cylinder head camshaft position actuator removal procedure

3. Remove EN 46105 (1) from the bank 2 camshafts.
4. Observe the markings (1) on the bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings:

• | The raised feature must always be oriented toward the center of the cylinder head.

• | An I indicates the intake camshaft.

• | An E indicates the exhaust camshaft.

• | The number indicates the journal position from the front of the engine.

5. Remove the camshaft bearing cap bolts (1) and caps (2).
6. Remove the camshafts (1).
7. Clean the camshaft in solvent and dry it with compressed air.
8. Inspect the camshaft. Refer to Camshaft Cleaning and Inspection .

### Installation Procedure

1. Ensure the camshaft sealing rings (1) are in place in the camshaft grooves.
2. Select the correct camshaft for the particular installation location. ID markings can be found on the rear end of each camshaft. The ID markings are defined as follows:

• | The first five digits refer to the date and time of production.

• | Example = 3L18H

• | Digits six through nine refer to engine production code

• | LY7 = Alloytec 190 engine

• | The last two digits refer to position:

• | LI = bank 2 intake

• | LE = bank 2 exhaust

• | RI = bank 1 intake

• | RE = bank 1 exhaust

3. Apply a liberal amount of engine oil to the camshaft journals and the bank 2 cylinder head camshaft carriers.

Important: Install the camshaft position actuator bolts but do not tighten at this stage.

4. Position the camshafts (1) on the cylinder head and assemble the camshaft actuators to the camshafts.
5. Ensure the camshaft lobes are in the neutral position with the flats on the back of the camshafts up and parallel (1) with the bank 2 cylinder head cylinder head cover rail.
6. Ensure the marks on the bank 2 exhaust camshaft position actuator and timing chain, made prior to the disassemble operation are aligned.
7. Ensure the marks on the bank 2 intake camshaft position actuator and timing chain, made prior to the disassemble operation are aligned.
8. Observe the markings on the bank 2 cylinder head camshaft bearing caps. Each bearing cap is marked (1) to identify its location. The markings have the following meanings:

• | The raised feature must always be oriented toward the center of the cylinder head.

• | The I indicates the intake camshaft

• | The E indicates the exhaust camshaft.

• | The number 2, 4, 6 indicates the cylinder position from the front of the engine.

9. Apply a liberal amount of engine oil to the camshaft bearing caps.
10. Install the camshaft bearing thrust cap (1) in the first journal of the bank 2 cylinder head.
11. Install the remaining bearing caps (2) with their orientation mark toward the center of the cylinder head.
12. Hand starts all the camshaft bearing cap bolts (1).

Notice: Refer to Fastener Notice in the Preface section.

13. Install the camshaft bearing cap bolts.

Tighten
Tighten the camshaft bearing cap bolt to 10 N·m (89 lb in).

14. Loosen the center intake camshaft bearing cap bolts 1, 2 and the center exhaust camshaft bearing cap bolts 3 and 4.
15. Retighten the center camshaft bearing cap bolts 1, 2, 3 and 4.

Tighten
Tighten the camshaft bearing cap bolt to 10 N·m (89 lb in).

16. Install the bank 2 cylinder head camshaft position actuators.