Valve seals — removal and installation

Special tool

	Valve Spring Compressor 303-361 (21-155)
	Adapter for 21-155 303-361-02 (21-155-02)
	Air bottle adapter 303-363 (21-157)
	Valve stem seal remover 303-374 (21-160)

Name	Specification
Engine oil	WSS-M2C912-A1

Withdrawal

1. Remove camshafts. For more information, refer to the chapter Camshafts available in this section. Remove the valve lifters and set them aside one by one.

2.

WARNING: Always wear protective goggles when working with compressed air. Failure to follow this instruction may result in injury.

Unscrew the spark plug from cylinder #1 and connect the special tool.



3.

CAUTION: Air pressure in the range (7-10) bar.

Connect special tools and apply compressed air to the cylinder.

• 1. Compress the valve spring.
• 2.Remove crackers.
• Remove the spring plate and valve spring

4. Remove the valve stem seal.

• 1.Insert the special tool.
• 2.Turn the special tool clockwise and pull it out.

Installation

1. Install the valve stem seal.

• Apply engine oil to the valve stem.
• Seal the grooves on the valve stem with a bushing to install the valve stem seal.
• Slide the slinger cap onto the valve stem and remove the bushing to install the slinger cap from the valve stem.

2.

NOTE: Check that the valve cotters are installed correctly.

Install the valve spring.

• Insert the valve spring and spring plate.
• 1. Compress the valve spring.
• 2.Install crackers.

3.

NOTE: Do not tighten at this stage.

Disconnect special tool 303-363.

4. Repeat these steps for all other cylinders.

5. Apply engine oil to the valve tappet and push the tappet into place.

6. Install camshafts. For more information, refer to the chapter Camshafts available in this section.