When replacing broken valve springs and defective Valve Stem Oil Seals, the
Cylinder Head does not need to be taken out. For this, two special tools and a source of compressed air are needed. If there is no compressed air, then a nylon rope will help to prevent the valves from dropping inside the cylinder. To do this one can remove the
Rocker Arm cover and spark plug, rotate the crankshaft to top dead center, connect an air hose to the spark plug hole, take off the rocker arm and
Pushrod, provide compressed air for the cylinder and use a valve spring compressor to extract valve spring and seal. It's vital to check for any harm on the valve stem before you install new Valve Stem Oil Seals. Finally reinstalling of valve spring retainer keepers is done followed by putting back the rocker arm pushrod spark plug as well as rocker arm cover.