KRYOTEC ENGINE 36 D. VALVES 1. Check valve leakages by pouring fuel on valve head. Fuel must not seep past valve seat. 2. Valves with burnt heads, excessive scoring and wear on stem should be replaced. 3. Check valve seat run out with respect to valve stem. If it exceeds specified limit replace valve. No attempt should be made to straighten bent valves. 4. If valve is free from any other defects except worn out seat, then only it can be rematch on valve grinding machine as follows: Clamp valve on grinding machine jaws as close as possible to valve head. Adjust grinding angle on graduated scale to achieve correct valve seat angle. Feed valve slowly towards grinding wheel until wheel just touches valve head. Grind at low feed until valve seat is just clean all around. NOTE After machining the valve seat, remove the valve from the grinding machine and check valve head thickness. The minimum valve head thickness of the valve is 0.85 mm. VALVES Measure Value Valve stem diameter- Intake (mm) 4.982 - 5.000 Valve stem diameter – Exhaust (mm) 4.972 - 4.990 VALVE SPRINGS Measure Value Outer diameter-intake valve seats (mm) 29.600 - 29.611 Outer diameter-exhaust valve seats (mm) 26.100 - 26.111 Valve seat angle in contact with valve 45° 30' +/- 1°
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