3508C, 3512C and 3516C Marine Engines Inlet and Exhaust Valves - Remove and Install Caterpillar


Inlet and Exhaust Valves - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
241-0124  Valve Spring Compressor 
441-0714  Tool As 

Start By:

  1. Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove".


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.




    Illustration 1g01134319

    ------ WARNING! ------

    Personal injury can result from being struck by parts propelled by a released spring force.

    Make sure to wear all necessary protective equipment.

    Follow the recommended procedure and use all recommended tooling to release the spring force.


  1. Use Tooling (A) to compress inner valve spring (3) and outer valve spring (4). Remove valve spring keepers (1).

  2. Carefully remove Tooling (A).

  3. Remove valve rotator (2), inner valve spring (3), and outer valve spring (4).

  4. Remove washer (5) from the exhaust valve guide.

  5. Remove inlet valve (6) and exhaust valve (7) from the valve guides.

    Note: If the exhaust valves or the inlet valves will be reused, put identification marks on the exhaust valves and the inlet valves for installation purposes.



    Illustration 2g01133465

  6. Use Tooling (B) to check the valve springs (spring force). Refer to Specifications, "Cylinder Head Valves" for additional information on the valve springs.

Installation Procedure

Table 2
Required Tools 
Tool  Part Number  Part Description  Qty 
241-0124  Valve Spring Compressor 


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.




    Illustration 3g01134256

    ------ WARNING! ------

    Improper assembly of parts that are spring loaded can cause bodily injury.

    To prevent possible injury, follow the established assembly procedure and wear protective equipment.


  1. Apply clean engine oil to the stem of exhaust valves (7). Install the exhaust valve into exhaust valve guide (10).

  2. Install washer (5), inner valve spring (3), and outer valve spring (4) on exhaust valve guide (10).

  3. Position valve rotator (2) on the stem of the exhaust valve.

  4. Use Tooling (A) to compress inner valve spring (3) and outer valve spring (4). Install valve spring keepers (1) on the exhaust valve.

    ------ WARNING! ------

    The valve spring keepers can be thrown from the valve when the valve spring compressor is released. Ensure that the valve spring keepers are properly installed on the valve stem. To help prevent personal injury, keep away from the front of the valve spring keepers and valve springs during the installation of the valves.


  5. Carefully remove Tooling (A). Strike the top of the valves with a soft faced hammer to ensure that valve spring keepers (1) are properly installed on the valve stems.

  6. Apply clean engine oil to the stem of inlet valves (6). Install the inlet valve into inlet valve guide.

    Note: Ensure that valve stem seal (8) is installed on inlet valve guide (9).

  7. Install inner valve spring (3) and outer valve spring (4) on inlet valve guide (9).

  8. Position valve rotator (2) on the stem of the inlet valve.

  9. Use Tooling (A) to compress inner valve spring (3) and outer valve spring (4). Install valve spring keepers (1) on the inlet valve.

    ------ WARNING! ------

    The valve spring keepers can be thrown from the valve when the valve spring compressor is released. Ensure that the valve spring keepers are properly installed on the valve stem. To help prevent personal injury, keep away from the front of the valve spring keepers and valve springs during the installation of the valves.


  10. Carefully remove Tooling (A). Strike the top of the valves with a soft faced hammer to ensure that valve spring keepers (1) are properly installed on the valve stems.

End By:

  1. Install the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install".

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