Cylinder Heads

Cylinder Head








Special Tool(s)

Disassembly





1. CAUTION: Do not place the cylinder head flat on the head; the valves will bend.

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

Install the special tool.





2. Remove the exhaust camshaft sprocket and the intake camshaft bolt, washer and spacer.





3. Compress the tensioner and install a lock pin.





4. Remove the special tool.





5. Remove the timing chain and the camshaft sprocket.





6. NOTE: LH tensioner is shown, RH tensioner is similar.

Remove the tensioner.





7. Remove the roller followers on the base circle.
1. Install the special tool on the valve spring.
2. Compress the tool and remove the roller follower.
8. Repeat the previous step for the remaining roller followers.





9. Remove the hydraulic lash adjusters.





10. CAUTION: Make sure the tool is seated correctly on the valve spring. Apply a small amount of air at a time. This will prevent the tool from shifting and causing damage to the cylinder head.

Install the air-operated spring compressor on the cylinder head.





11. Compress the valve spring compressor and remove the key from the valves.





12. Remove the intake valves and the valve springs.
1. Release the pressure and remove the valve spring compressor.
2. Remove the intake valves and the valve springs from the cylinder head.





13. Remove the valve stem seals.





14. CAUTION: The outer bolts on the outer cam bearing cap (exhaust) are longer and must be returned to the same location or engine damage may occur.

NOTE: Identify the camshaft-to-cylinder head location. Caps are not interchangeable.

Remove the bolts and the camshaft bearing cap assemblies.





15. Remove the camshafts.

Assembly





1. NOTE: LH is shown, RH is similar.

Install the camshafts.





2. Install the camshaft bearing cap assemblies.





3. Install the valve stem seals.
4. Install the valves and the valve springs.





5. CAUTION: Make sure the tool is seated correctly on the valve spring. Apply a small amount of air at a time. This will prevent the tool from shifting and causing damage to the cylinder head.

Install the air-operated spring compressor on the cylinder head.





6. Compress the valve spring compressor and install the key on the valves.





7. Install the hydraulic lash adjusters.





8. Install the roller followers.
1. Install the special tool on the valve spring.
2. Compress the spring and install the roller follower.
9. Repeat the previous step for the remaining roller followers.





10. NOTE: LH tensioner is shown, RH tensioner is similar.

Install the tensioner.





11. CAUTION: Timing marks must be at 12 o'clock and indexed at 6 o'clock.

Install the camshaft sprockets and the chain as an assembly.





12. Install the special tool.





13. Tighten the exhaust camshaft sprocket and the intake camshaft bolt washer and spacer in two stages:
^ Stage 1: Tighten to 40 Nm (30 ft. lbs.).
^ Stage 2: Tighten and additional 90 degrees.






14. Remove the special tool.