5. Inspection and servicing of basic engine parts1124) Valve stem sealsThe valve stem seals in the intake/exhaust valveguides cannot be re-used. When they areremoved, be sure to replace them.When assembling the intake/exhaust valves,apply an adequate quantity of engine oil on thevalve stem before inserting them.Exhaust stem seal is marked by yellow. Intakestem seal is not marked.a) Apply lube oil to the lip.b) Push with the inserting tool for installation.Measure and check the projection of valve stem seal tokeep proper clearance between valve guide and stemseal.5.2.4 Valve springs(1) Checking valve springs1) Check the spring for scratches or corrosion.2) Measure the free length of the spring.3) Measure inclination.Valve stem seal projection (mm)10.9-11.2(Stem seal insertion)Valve stem seal inserting toolStem sealValve guideCylinder headFree length(Valve spring)Inclination(Valve spring)BASquare gauge
