Valve clearance — adjustment

Special tool

	Valve Adjustment Compression Tool 303-195 (21-106)
	Valve Shim Pliers 303-196 (21-107)

General equipment: Set of feeler gauges.

Name	Specification
Adjusting shims

1. Remove the cylinder head cover. For more information, refer to the Cylinder Head Cover chapter in this section.

2. Remove the oil catch can.



3. Reinstall the bearing cap nuts.



4. Measure the valve clearance.

• Turn the crankshaft so that the pair of cams of the adjustable cylinder are facing upward.
• Check the valve clearance and record the results.
• If the clearance at the installation location of any of the adjusting shims is outside the permissible range, replace that adjusting shim as described in the next paragraph.

5.

NOTE: Rotate the crankshaft another 90 degrees.

NOTE: The piston of the adjustable cylinder must not be at top dead center.

Replace the adjusting shim.

• 1.Using the special tool, press down on both valve lifters simultaneously.
• 2. Using a special tool, remove the adjusting shim.
• Please note the thickness of the adjusting shim marked on the back of the shim.
• Install a new adjusting shim to obtain the correct valve clearance.

6. Remove the bearing cap nuts.




7. Install the oil catch can.



8. Install the cylinder head cover. For more information, refer to the Cylinder Head Cover chapter in this section.