Cylinder Head Disassembly/Assembly of Subassemblies

Cylinder Head

Special Service Tools





Compressor, Valve Spring
303-581 (T97T-6565-A)






Installer, Valve Stem Oil Seal
303-370 (T90T-6571-A)

Disassembly
1 Remove the spark plugs.





2 Using the special tool, remove the camshaft roller followers.





3 Using the special tool, remove the valve spring retainer keys, the valve spring and the retainer.
4 Remove the valve.
5 Repeat the procedure until all of the valves are removed.
6 Remove the valve stem seals.





7
NOTE:
Mark the position of the camshaft bearing caps so they can be installed in the original position.
Remove the bolts in the sequence shown and remove the camshaft bearing caps.





8 Remove the camshaft.
9 Inspect the cylinder head. For additional information, refer to.
Assembly

NOTE:
Prior to assembly, coat all of the valve train components with clean engine oil.





1 Install the camshaft.





2
NOTE:
The camshaft bearing caps must be installed in the original position.

NOTE:
After installing the bolts, check the camshaft for free rotation.
Position the oil supply tube, the camshaft bearing caps, and bolts.
- Tighten in the sequence shown in two stages:
- Stage 1: Tighten to 6 Nm (53 lb-in).
- Stage 2: Tighten to 16 Nm (12 lb-ft).
3 Install the valve.





4 Using the special tool, install the valve stem seals.





5 Using the special tool, install the valve spring, the retainer and the retainer keys.
6 Repeat the procedure until all of the valves are installed.





7 Install the spark plugs.
8 Install the camshaft roller followers only when the cylinder head is installed in the vehicle and the timing procedure has been carried out.