3044C Industrial Engine and Engines for Caterpillar Built Machines Inlet and Exhaust Valve Guides - Remove and Install Caterpillar


Inlet and Exhaust Valve Guides - 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    
A     4C-6366     Valve Guide Driver     1    

Start By:

  1. Remove the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.





    Illustration 1g01000170

  1. Use Tooling (A) to remove the valve guides from the cylinder head.

  1. Repeat the procedure for the remaining valve guides.

    Note: When new valve guides are installed, new valves and new valve seat inserts must be installed.

  1. Remove the valve seat inserts. Refer to Disassembly and Assembly, "Inlet and Exhaust Valve Seat Inserts - Remove and Install".

Installation Procedure

Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A     4C-6366     Valve Guide Driver     1    
B     4C-6370     Valve Guide Collar     1    
C     157-3720     Valve Seat Cutter     1    


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.





    Illustration 2g01033990

  1. Position the valve guide in the cylinder head. Carefully tap the valve guide in order to start the installation. Use Tooling (A) and (B) to seat the valve guide in the cylinder head.

    Note: The counterbore in Tooling (B) installs the valve guide to the correct Height (X) .

  1. Check the protrusion of the valve guides. Refer to Specifications, "Cylinder Head Valves" for the protrusion of the valve guide above the valve spring recess.

  1. Repeat the procedure to install the remaining valve guides.

  1. Install the valve seat inserts. Refer to Disassembly and Assembly, "Inlet and Exhaust Valve Seat Inserts - Remove and Install".



    Illustration 3g01033994

    Note: After installing the valve guides and valve seat inserts, the valve guides must be reamed and the valve seat inserts must be cut to the finished diameter. The valve guides and valve seat inserts are cut and reamed in one operation. This procedure ensures the concentricity of the valve seat to the valve guide in order to create a good seal. Refer to Specifications, "Cylinder Head Valves" for the finished diameter of the valve guides and valve seat inserts.

  1. Position Tooling (C) into the valve guide. Carefully turn the handle in a clockwise direction and gradually move the reamer into the valve guide until the valve guide is reamed to the finished size.

  1. Continue to turn the handle in a clockwise direction in order to cut the valve seat insert. Remove the minimum amount of material in order to ensure a good valve seat. Keep the valve seat as narrow as possible.

  1. Remove Tooling (C). Clean the debris from the valve guide and the valve seat.

End By: Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".

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