Damaged valve springs and faulty valve stem seals are usually repaired by replacing them, which normally does not call for head removal, and uses such accessories as special tools, and compressed air. Start with the process of the elimination of the valve cover, and spark plug from the cylinder in question, or all the spark plugs, if changing all the valve stem seals. Rotate the crankshaft until the piston is at the top dead centre, on the compression stroke and if replacing the total engine seals, start with cylinder number one and continue with the firing sequence. Insert an adapter into the spark plug hole then attach an air hose to a compressed air source. Use compressed air on the cylinder, this way you do not rotate crankshaft independently to the camshaft because this may lead to major damages on the engine. The valves should be held in place by air pressure; if not, the
Cylinder Head may have to be taken off for an inspection. Take off the bolt, fulcrum, and
Rocker Arm for the ceaseless valve and if replacing all seals take off all the rocker arms. Lever type compressor is used to compress the valve spring and then the keepers, spring retainer, valve spring and guide seal can be removed. A valve stem must also be covered with a rubber band or tape so that it does not fall into the combustion chamber and release air pressure. Check the valve stem for wear and deformation and observe that moving in the guide without tight fit. Increase air pressure to keep the valve closed, lubricate the valve stem with the required engine oil and fit a new guide seal by means of the provided tool. Place the lower seat and the valve spring over the head of the valve then put the valve spring retainer into place; set the upper valve while compressing the seat; put the small end of the spring and carefully slide the keepers into place; use a little grease to prevent keepers from falling off. Take off the pressure from the spring tool with explicit attention to the fact that the keepers should be in place. The steps used to complete the installation should be done in the reverse order, after this start the engine and conduct some checks such as checking for oil stains or any strange sounds originating from the vicinity of the valve cover.