Bulkhead
1. Remove the camshafts and valve adjusters.
2. Using a special tool, compress the valve spring.
3. Remove the valve stem seals.
4. Remove the plate, spring and spring seat.
5. Remove the valve through the combustion chamber.
6. After removal, place each valve and its components in a separate labeled bag.
Cleaning
1. Carefully clean off any traces of old head gaskets using a scraper or a special solvent.
2. Remove deposits from the head bores.
3. Clean out any dirt and sealant residue from the threaded holes.
4. Clean the head with solvent and dry it.
5. Clean and dry the valve adjusters, valve springs, valve guides, retainers and spring seats with solvent.
6. Clean the valves.
Examination
1. Check the cylinder head for cracks and damage; if necessary, the head should be processed on a special machine or replaced.
2. Using a ruler and feeler gauge, check to see if the surface on which the head gasket is installed is deformed (a typical cylinder head is shown).
3. Check the valve seats; if there is any damage, contact a specialist.
4. Measure the clearances between the valve guides and the valve stems. The gap should be approximately 1.6 mm. If necessary, the bushings should be replaced.