Why need to rotate
The valve spindle is fitted with a winged valve rotator. The kinetic energy in the exhaust gas rotates the valve a small amount as it passes. This keeps the valve at an even temperature and helps reduce the build up of deposits on the valve seat.
How to check
This check is carried out when engine was running. first pull up the indicator rod placed at the top of the exhaust valve and turn it to 90 degree and let it rest on air piston.
As the air piston moves the indicator will follow its movement. during rotation of the valve spindle, the top position of the indicator will change about 6 mm, because of the groove in the piston.
During engine operation, the spindle must rotate in the range of 0.5 to 5 rpm.
Arrangement
The valve spindle is fitted with a winged valve rotator. The kinetic energy in the exhaust gas rotates the valve a small amount as it passes. This keeps the valve at an even temperature and helps reduce the build up of deposits on the valve seat.
How to check
This check is carried out when engine was running. first pull up the indicator rod placed at the top of the exhaust valve and turn it to 90 degree and let it rest on air piston.
As the air piston moves the indicator will follow its movement. during rotation of the valve spindle, the top position of the indicator will change about 6 mm, because of the groove in the piston.
During engine operation, the spindle must rotate in the range of 0.5 to 5 rpm.
Arrangement
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