Note: Valve clearance checking and adjustment must be carried out with the engine cold.
1. Measure and record all valve clearances as described previously.
2. Remove the camshafts (see page 3.9).
3. Remove a shim from one of the valves whose clearance required adjustment.
4. Measure the original shim, using a micrometer.
5. Calculate the shim thickness required to give the correct clearance. Clearance too small; fit a thinner shim. Clearance too large; fit a thicker shim.
Note: Shims are available ranging from 2.00 mm to 3.20 mm in increments of 0.025 mm.
6. Fit the selected shim to the tappet bucket.
7. Repeat the procedure until all valves requiring adjustment have been correctly set.
8. Refit the camshafts (see page 3.12).
9. Rotate the engine several times to fully seat the shims.
10. Repeat the clearance checks on all valves, adjust as necessary.
11. Refit the cam cover (see page 3.6).