Cylinder Head - Disassembly and Assembly

Cylinder Head









NOTE: RH cylinder head shown, LH cylinder head similar.











Disassembly

All cylinder heads

1. Remove the 2 bolts and the exhaust manifold heat shield.

2. Remove the 6 nuts and the exhaust manifold.
- Discard the nuts and gasket.

3. Clean and inspect the exhaust manifold. For additional information, refer to Engine System - General Information Exhaust Manifold Cleaning and Inspection.

4. Remove and discard the 6 exhaust manifold studs.

5. Remove the timing chain guide pin.

6. NOTE: If the components are to be reinstalled, they must be installed in the same positions. Mark the components for installation into their original locations.

Using the Valve Spring Compressors, remove the keys, retainer and spring.





7. Remove the valve from the cylinder head.

8. Remove and discard the valve stem seal.

9. Repeat the above steps for each valve.

RH cylinder head

10. Remove the timing chain tensioner arm pin.

11. Remove and discard the Cylinder Head Temperature (CHT) sensor.





Assembly

All cylinder heads

1. NOTE: If the components are to being reinstalled, they must be installed into their original location.

NOTE: Lubricate the valve stem and valve stem seal with clean engine oil prior to installation.

Using the Valve Stem Oil Seal Installer, install a new valve stem seal.





2. Install the valve.

3. Using the Valve Spring Compressors, install the valve spring, retainer and key.





4. Repeat the above steps for each valve.

5. Install the timing chain guide pin and tighten in 2 stages.
- Stage 1: Tighten to 20 Nm (177 lb-in).

- Stage 2: Tighten an additional 60 degrees.

RH cylinder head

6. Install a new CHT sensor.
- Tighten to 10 Nm (89 lb-in).

7. Install the timing chain tensioner arm pin and tighten in 2 stages.
- Stage 1: Tighten to 20 Nm (177 lb-in).

- Stage 2: Tighten an additional 60 degrees.

8. Install 6 new RH exhaust manifold studs.
- Tighten to 12 Nm (106 lb-in).

9. NOTICE: Failure to tighten the exhaust manifold nuts to specification a second time will cause the exhaust manifold to develop an exhaust leak.

Using a new gasket, install the RH exhaust manifold and 6 new nuts. Tighten in 2 stages in the sequence shown:

- Stage 1: Tighten to 19 Nm (168 lb-in).

- Stage 2: Tighten to 25 Nm (18 lb-ft).





10. Install the RH exhaust manifold heat shield and the 2 bolts.
- Tighten to 12 Nm (106 lb-in).

LH cylinder head

11. Install 6 new LH exhaust manifold studs.
- Tighten to 12 Nm (106 lb-in).

12. NOTICE: Failure to tighten the exhaust manifold nuts to specification a second time will cause the exhaust manifold to develop an exhaust leak.

Using a new gasket, install the LH exhaust manifold and 6 new nuts. Tighten in 2 stages in the sequence shown:

- Stage 1: Tighten to 19 Nm (168 lb-in).

- Stage 2: Tighten to 25 Nm (18 lb-ft).





13. Install the LH exhaust manifold heat shield and the 2 bolts.
- Tighten to 12 Nm (106 lb-in).