Cylinder Head

Cylinder Head
Special Tool(s)

Special Tool(s):

Material:

Disassembly

1. CAUTION: Before disassembly begins, mark the valve position on the face of each valve being removed. The valves must be reinstalled into the same positions.

Install the special tool.





2. NOTE: RH shown, LH similar.

Remove the bolt, washer and camshaft drive sprocket.





3. NOTE: RH shown, LH similar.

Remove the bolt, washer and spacer.





4. Compress the secondary timing chain tensioner and install a lockpin.





5. NOTE: LH shown, RH similar.

Remove the timing chain and the 2 camshaft sprockets.





6. NOTE: LH shown, RH similar.

Remove the 2 bolts and the secondary timing chain tensioner.





7. Using the special tool, compress the valve spring and remove the retainer keys.





8. Remove the valve, spring retainer, valve spring and the valve seal.
- Discard the valve seal.
- Remove the valve.





9. Repeat the previous 2 steps and remove all of the retainer keys, spring retainers, valve springs, valve seals and valves.

10. CAUTION: The cam bearing cap bolts vary in length and head design and must be installed in their original positions. Camshaft bearing caps are not interchangeable and must be installed in their original positions.

NOTE: The camshaft bearing cap with 3 bolts is located at the front of the LH cylinder head and at the rear of the RH cylinder head.

Remove the camshaft bearing cap bolts in the sequence shown.
- Remove the camshaft bearing caps.
- Remove the camshafts.





Assembly

1. NOTE: Lubricate the camshafts with clean engine oil prior to installation.

NOTE: RH shown, LH similar.

Install the camshafts.





2. CAUTION: The cam bearing cap bolts vary in length and head design and must be installed in their original positions. Camshaft bearing caps are not interchangeable and must be installed in their original positions.

NOTE: The camshaft bearing cap with 3 bolts is located at the front of the LH cylinder head and at the rear of the RH cylinder head.

NOTE: Lubricate the camshaft bearing cap bearing surfaces with clean engine oil prior to installation.

Install the camshaft bearing caps.
- Install the bearing cap bolts and tighten in the sequence shown to 10 Nm (89 inch lbs.).





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

Using the special tools, install a new valve seal.
- Repeat step to install all of the new valve seals.





4. Position the valve, the valve spring and the spring retainer into the cylinder head.





5. Install the special tool between the valve spring coils to protect the valve seal from damage.





6. Using the special tool, compress the valve spring and install the retainer keys.





7. Repeat the 3 previous steps and install all of the valves, valve springs, valve spring retainers and retainer keys.

8. NOTE: LH shown, RH similar.

Install the secondary timing chain tensioner and the bolts.
- Tighten to 10 Nm (89 inch lbs.).





9. NOTE: LH shown, RH similar.

Index the keyways on the camshafts to the 6 o'clock position.





10. CAUTION: Timing marks must be at 12 o'clock position.

NOTE: LH shown, RH similar.

Install the camshaft sprockets and the chain as an assembly.
- Remove the lockpin from the secondary timing chain tensioner.





11. Install the special tool.





12. NOTE: RH shown, LH similar.

Install the camshaft spacer, washer and bolt, and hand-tighten the bolt.





13. NOTE: RH shown, LH similar.

Install the camshaft sprocket, washer and bolt, and hand-tighten the bolt.





14. NOTE: RH shown, LH similar.

Tighten the bolts in 2 stages:
- Stage 1: Tighten to 40 Nm (30 ft. lbs.).
- Stage 2: Tighten an additional 90 degrees.