Valve Clearance: Adjustments

No. 1 Cylinder TDC:

Measure Valve Clearance
- Remove Cylinder Head Covers
- Set No.1 cylinder to TDC/compression.
- Turn the crankshaft pulley and align its groove with the "0" mark on the No.1 timing belt cover.

Valve Measurement Step 1:

- Check that the valve lifters on the No.1 cylinder are loose and valve lifters on the No.6 cylinder are tight.
- If not, turn the crankshaft pulley one complete revolution.
- Measure the clearance of No.1 (IN) and No.4 (IN) and No.1 (EX) and No.5 (EX) valves.
- Measure only the valves indicated in the illustration.
- Record the measurements which are out of specification. They will be used later to determine the required replacement shims.

Valve clearance (Cold):
Intake 0.15 - 0.25 mm (0.006 - 0.010 in.)
Exhaust 0.20 - 0.30 mm (0.008 - 0.012 in.)

Valve Measurement Step 2:

- Turn the crankshaft pulley 2/3 revolution (240°) and measure the clearance of No.3 (IN) and No.5 (IN) and No.3 (EX) and No.6 (EX) valves.
- Check that the valve lifters on the No.3 cylinder are loose.
- Measure only the valves indicated in the illustration.
- Record the measurements which are out of specification. They will be used later to determine the required replacement shims.

Valve Measurement Step 3:

- Turn the crankshaft pulley 2/3 revolution (240°) and measure the clearance of No.2 (IN) and No.6 (IN) and No.2 (EX) and No.4 (EX) valves.
- Check that the valve lifters on the No.2 cylinder are loose.
- Measure only the valves indicated in the illustration.
- Record the measurements which are out of specification. They will be used later to determine the required replacement shims.



Adjust Valve Clearance

Removing Adjusting Shim:

- Remove the adjusting shim.
- Turn the crankshaft so that the cam lobe for the valve to be adjusted faces up.
- Position the valve lifter notch so that the shim can be removed with a small screwdriver.
- Using SST (A), press down the valve lifter and place SST (B) between the camshaft and valve lifter. Remove SST (A).

SST 09248-55020 (09248-05011, 09248-05021)

Removing Adjusting Shim:

HINT: For easy removal of the shim, when positioning SST (B), set it on the lifter so there is space enough to be able to remove the shim.

Removing Adjusting Shim:

- Remove the adjusting shim with a small screwdriver and magnetic finger.
- Determine the replacement shim size by using the following Formula or Chart.

Shim Measurement:

- Using a micrometer, measure the thickness of the shim which was removed.
- Calculate the thickness of the new shim so that the valve clearance comes within specified value.

T = Thickness of used shim
A = Measured valve clearance
N = Thickness of new shim

Intake N = T + (A - 0.20 mm (0.0079 in.)
Exhaust N = T + (A - 0.25 mm (0.0098 in.)

Intake Shim Selection Chart:

Intake Shim Chart

Exhaust Shim Selection Chart:

Exhaust Shim Chart

- Select a new shim with a thickness as close as possible to the calculated value.

HINT: Shims are available in 17 sizes, in increments of 0.050 mm (0.0020 in.), from 2.500 mm (0.0984 in.) to 3.300 mm (0.1299 in.).

Installing Adjusting Shim:

- Install the new adjusting shim.
- Place the new adjusting shim on the valve lifter.
- Using SST (A), press down the valve lifter and remove SST (B).

SST 09248-55020 (09248-05011, 09248-05021)

- Recheck the valve clearance.