Cylinder Head Disassembly

1. Remove intake and exhaust manifolds:
a. Remove spark plugs.
b. Remove the nine intake and eight exhaust manifold mounting nuts.
c. If cylinder head intake and exhaust manifold studs come out, nuts should be removed from studs, threads cleaned, and studs carefully installed. Torque to 12 Nm (106 inch lbs.).





2. Uniformly remove rocker arm assembly attachment bolts, the two rocker arm shafts, and rocker arm assemblies guide plates and lifters.
3. Remove the rear cylinder head plug or camshaft thrust plate and screws.

NOTE: An impact driver and T-40 torx are required to break the screws loose if the camshaft is removed out the front of the cylinder head. New torx screws are usually required if the camshaft is removed out the front of the cylinder head.

CAUTION: The camshaft can be removed out either end of the cylinder head. The camshaft plug must be driven inward or toward the camshaft and removed with a magnet from the cylinder head. A new plug is required when the camshaft is removed out the rear of the cylinder head.





4. Remove the camshaft.





5. Remove valves and stem seals:
a. Remove the valve spring cap retainer, spring, and valve, using service tool SA9125E, or equivalent.
b. Use seal removal tool SA9102E-A, or equivalent, to remove the valve stem oil seals.

CAUTION: If a valve stem seal is removed, it must be discarded.