(3) Inspection of valve and valve guide 1) Valve z After cleaning valve with fuel, check it. z Valve stem outer diameter Measure the valve stem outer diameter at 3 positions (top, middle, and bottom), and check for any wear and if beyond the limit value, replace the valve. z Valve seat contacting faces Check the valve seat contact surface for any crack and wear, and if necessary, correct with grinding paper, and if excessive, replace it. z Valve head thickness Measure the thickness of valve head and if beyond the limit value, replace the valve.
DL06 Diesel Engine Disassembly and Reassembly of Major Components 72 Dimension Description Standard Limit Intake valve stem φ6.963~φ6.977mm φ6.93 mm Exhaust valve stem φ6.950~φ6.964mm φ6.91 mm Standard Limit Intake valve (A) 3.3~3.7 mm 1 mm or less Exhaust valve (A) 3.3~3.7 mm 1 mm or less