How to Overhaul Caged Exhaust Valve In An Auxiliary Engine

• Slacken the holding nuts on the cylinder head, take out the distance piece and remove the valve. 

• Keep the exhaust valve in a stand. 

• Use the compression tool to compress the spring.

• Once the spring is compressed, remove the valve cotters.

• Remove the  valve rotator.

• Remove the springs, spring seat and the valve spindle.

• Separate the valve seat and the valve jacket.

• Remove the cooling water o ring.

• Check the clearance between valve spindle and guide.

• If it is greater than the set limit, remove the valve guides and sealing ring.

Now assembly,

• Renew the valve guides and sealing ring.
• Renew the cooling water o ring.
• Join the valve seat and jacket back.
• Lap the valve spindle and the seat with grinding paste.

• Once the desired surface finish is achieved assemble the valve spindle in the valve housing.

• Assemble spring seat, springs and the valve rotator.
• Use the compression tool to compress the spring.

• Fix the cotters and remove the exhaust valve from the stand.