Remove the cam pulse generator (front cylinder head only, page 5-69).
Remove the valve spring cotters using the valve spring compressor.
Tool: Valve spring compressor 07757-0010000.

Compressing the valve springs more than necessary will cause loss of valve spring tension.
Remove the valve spring compressor, then remove the retainer, spring and valve.

Mark all parts during disassembly so they can be placed back in their original locations during installation.
Remove the stem seals and spring seats.
Do not reuse a removed stem seal.

Do not reuse a removed stem seal.
Remove the carbon deposits from the combustion chamber to avoid damaging the gasket and valve seat surfaces and clean the head gasket surfaces.

Gasket material will come off easier if soaked in high flash point cleaning solvent.