Installation Steps
Caterpillar ET 2025A & 2019C Electronic Technician Diagnostic Software Download and Installation
Note: Keep all parts clean and free of impurities.
Impurities will cause rapid wear and shorten component life.
Note: The valve hard surfaces have been polished. Do not use abrasives on the valves. Abrasives will damage the valve hard surface polishing.
1. Clean all parts of the cylinder head assembly. Ensure that all openings, coolant passages, and lubrication passages in the cylinder head are free of debris. Inspect the cylinder head assembly parts according to steps 1.a through 1.e. Replace any damaged or worn parts.
a. Inspect the cylinder head for wear or damage. For correct procedures, see System Operation, Testing, and Adjustment,
"Cylinder Head Inspection".
b. Inspect the valve seats for wear or damage. For more information, see the technical specifications, "Cylinder Head Valves".
c. Inspect the valve guides for wear or damage. For more information, please refer to the Technical Specifications, "Cylinder Head Valves" and System Operation, Testing and Adjustment, "Valve Guides - Inspection".
d. Inspect the valves for wear or damage. For more information, please refer to the Technical Specifications, "Cylinder Head Valves".
e. Inspect the valve springs for wear and for correct length. For more information, please refer to the Technical Specifications, "Cylinder Head Valves".
2. Lubricate the valve (5) stems with clean engine oil. Install the valve (5) in its appropriate position on the cylinder head. Check the depth of the valve below the cylinder head surface. For more information, please refer to System Operation, Testing and Adjustment, "Valve Depth - Inspection".
3. Use appropriate lifting equipment to flip the cylinder head. The cylinder head weighs approximately 96 kg (212 lb).
Note: Ensure all valves remain in place.
4. Install the new valve stem seals (4) onto the individual valve guides. The intake and exhaust valve stem seals are different and can be distinguished using color markings.
Note: The outer surface of the valve guide must be clean and dry before installing the valve stem seal (4).
CAT Comm Adapter 3 478-0235 Diagnostics for Caterpillar
5. Install the valve spring (3) onto the cylinder head. Place the valve spring seat (2) onto the valve spring (3).
Warning: Being struck by parts propelled by the spring force can cause personal injury.
Ensure you wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tools to release the spring force.
6. Install tool (A) in the appropriate position on the cylinder head to compress the valve spring (3).
Caution: Ensure the valve spring is compressed evenly at all four corners; otherwise, damage to the valve stem may occur.
7. Apply sufficient pressure to tool (A) to install the valve retainer (1).
Note: When compressing the spring, do not allow the valve spring seat (2) to contact the valve stem seal (4).
Warning
When the valve spring compressor is released, the valve spring retainer will pop out of the valve. Ensure
The valve spring retainer is correctly installed on the valve pushrod. To prevent personal injury, keep away from the front of the valve spring retainer and the valve spring when installing the valve.
8. Carefully release the pressure on tool (A).
12.2021 Caterpillar ECM ECU Flash Files Full Set Download
9. Repeat steps 5 through 8 for the remaining valves.
10. Remove tool (A) from the cylinder head.
End: a. Install the cylinder head. For correct procedures, see Disassembly and Assembly, "Cylinder Head - Installation".
