Cylinder Heads
Cylinder HeadPart 1 Of 2:
Special Tools:
Special Tool(s)
Disassembly
1. CAUTION: Do not place the cylinder head flat on the bench; the valves will bend. 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. Using the special tool, compress the intake valve spring.
3. NOTE: Valve stem seals should be visually inspected if new seals are not installed.
Remove the valve spring retainer keys, the valve spring retainer, the valve spring and the valve stem seal.
4. Using the special tool, compress the exhaust valve spring.
5. NOTE: Valve stem seals should be visually inspected if new seals are not installed.
Remove the valve spring retainer keys, the valve spring retainer, the valve spring and the valve stem seal.
6. Remove the exhaust camshaft sprocket and the intake camshaft bolt, washer and spacer.
7. Compress the tensioner and install a lock pin.
8. Remove the timing chain and the camshaft sprocket.
9. NOTE: LH tensioner is shown, RH tensioner is similar.
Remove the tensioner.
10. Remove the camshafts.
11. Remove the hydraulic lash adjusters.
12. Remove the valve stem seals.
13. 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.
Assembly
1. Install the valve stem seals.
2. Install the hydraulic lash adjusters.
3. NOTE: LH is shown, RH is similar.
Install the camshafts.
^ Lubricate the camshafts with clean engine oil.
4. Install the camshaft bearing cap assemblies.
5. Using the special tools, install the new intake valve stem seals.
6. Using the special tools, install the new exhaust valve stem seals.
7. Install the special tool between the valve spring coils to protect the valve stem seal from damage.
8. Using the special tool, install the intake valve spring, the spring retainer and the valve spring retainer keys.
9. Using the special tool, install the exhaust valve spring, the spring retainer and the valve spring retainer keys.
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. Install the camshaft spacer, washer and bolt, and hand-tighten the bolt.
14. Install the camshaft sprocket, washer and bolt, and hand-tighten the bolt.
15. Tighten the bolts in two stages:
^ Stage 1: Tighten to 40 Nm (30 ft. lbs.).
^ Stage 2: Tighten and additional 90 degrees.
16. Remove the special tool.