Note. A new or remanufactured cylinder head can always be ordered at a car service workshop or at the warehouse of the car manufacturer's company service center. Due to the need to use some special tools during disassembly and checking the condition of the head, the compilers of this Guide believe that it will be easier and cheaper for an amateur mechanic to purchase a replacement head than to get involved in a rather complicated restoration repair of a worn one.
1. Disassembly of the cylinder head requires the preliminary dismantling of the elements of the valve mechanism (intake and exhaust valves with related components). On SOHC engines, remove the rocker arm assemblies with axles. Remove the camshafts with valve lifters from the heads (for a description of the procedures for checking the status of components, see Section Checking the condition of camshafts, valve lifters and bearings).
Attention! On SOHC engines, the removed tappets must not be turned sideways to prevent air pockets from entering them (see part SOHC engines this chapter). Alternatively, the removed tappets should be stored in a container filled with oil.
2. Prepare a set of clearly labeled plastic bags for organized storage of removed valve train components.
3. Using a special tool, compress the springs of the first valve and remove the crackers of the split lock of the spring plate from the groove on the rod. Carefully release the tool and remove the spring plate, springs and their seat from the valve (depending on configuration).
Attention! Be careful not to damage the inner walls of the tappet seat when compressing the valve springs.
4. Remove the valve from the cylinder head and remove the oil deflector cap from the guide sleeve. If the valve is jammed in the sleeve, push it back into the head and with a whetstone or a fine-toothed file, carefully clean the edges of the groove for installing crackers.
5. In the same manner, remove the remaining valve assemblies. Put the removed components of each of the valves in a separate, labeled bag - during assembly, each part must be installed exactly in its original place.
6. Once all the valvetrain components have been removed and stowed in an organized manner, you can proceed to the cleaning and inspection procedures for the engine (for a full-scale refurbishment, finish dismantling the unit first).