VALVES AND VALVE SPRINGS5-30EAS24290CHECKING THE VALVES AND VALVEGUIDESThe following procedure applies to all of thevalves and valve guides.1. Measure:• Valve-stem-to-valve-guide clearanceOut of specification → Replace the valveguide.2. Replace:• Valve guideTIPTo ease valve guide removal and installation,and to maintain the correct fit, heat the cylinderhead to 100 °C (212 °F) in an oven.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Remove the valve guide with the valveguide remover “1”.b. Install the new valve guide with the valveguide installer “2” and valve guide remover“1”.c. After installing the valve guide, bore thevalve guide with the valve guide reamer “3”to obtain the proper valve-stem-to-valve-guide clearance.• Valve-stem-to-valve-guide clearance =Valve guide inside diameter “a” -Valve stem diameter “b”Valve-stem-to-valve-guide clear-anceValve-stem-to-valve-guide clear-ance (intake)0.010–0.037 mm (0.0004–0.0015 in)Limit0.080 mm (0.0032 in)Valve-stem-to-valve-guide clear-ance (exhaust)0.025–0.052 mm (0.0010–0.0020 in)Limit0.100 mm (0.0039 in)
