Cylinder Heads

Cylinder Head





Special Tool(s)





Materials

Disassembly





1. CAUTION: Before disassembly begins, mark the valve position on the face of each valve being removed. The valves must be installed in their original 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 shown, RH tensioner similar.

Remove the tensioner.





7. Install the special tool between the valve spring coils to protect the intake valve stem seal from damage.





8. Using the special tool, compress the intake valve spring. Remove the intake valve spring retainer keys.





9. NOTE: Valve stem seals should be visually inspected if new seals are not installed.

Remove the special tool, the valve spring retainer, the valve spring and the valve stem seal.
10. Repeat above three steps to remove all necessary intake valve spring assemblies.





11. Install the special tool between the valve spring coils to protect the exhaust valve stem seal from damage.





12. Using the special tool, compress the exhaust valve spring. Remove the exhaust valve spring retainer keys.





13. NOTE: Valve stem seals should be visually inspected if new seals are not installed.

Remove the special tool, the valve spring retainer, the valve spring and the valve stem seal.
14. Repeat above three steps to remove all necessary exhaust valve spring assemblies.





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

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

Remove the bolts and the camshaft bearing cap assemblies.





16. Remove the camshafts.





17. Remove the hydraulic lash adjusters.

Assembly





1. Install the hydraulic lash adjusters.





2. NOTE: LH shown, RH similar.

Install the camshafts.





3. Install the camshaft bearing cap assemblies.





4. Using the special tools, install the new intake valve stem seals. Repeat this step to install all necessary intake valve stem seals.





5. Using the special tools, install the new exhaust valve stem seals. Repeat this step to install all necessary exhaust valve stem seals.





6. Install the special tool between the valve spring coils to protect the intake valve stem seal from damage.





7. Position the intake valve spring and the spring retainer over the intake valve stem and the valve seal.





8. Using the special tool, compress the intake valve spring. Install the intake valve spring retainer keys.
9. Repeat above three steps to install all necessary intake valve spring assemblies.





10. Install the special tool between the valve spring coil to protect the exhaust valve stem seal from damage.





11. Position the exhaust valve spring and the spring retainer over the exhaust valve stem and the valve seal.





12. Using the special tool, compress the exhaust valve spring. Install the exhaust valve spring retainer keys.
13. Repeat above three steps to install all necessary exhaust valve spring assemblies.





14. NOTE: LH tensioner shown, RH tensioner similar.

Install the tensioner.





15. 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.





16. Install the special tool.





17. 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 an additional 90 degrees.





18. Remove the special tool.