Valve springs — removal and installation

Special tool

	Valve Spring Compressor 303-361 (21155)
	Adapter for 21-155 303-361-02 (2115502)
	Air bottle adapter 303-363 (21157)
	Valve stem oil seal remover 303-374 (21160)

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.

Remove 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.

Installation

1.

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.

2.

NOTE: Do not tighten at this stage.

Disconnect the special tool 303-363 and insert the spark plug.

3. Repeat these steps for all other cylinders.

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

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