Remove both head covers.
Caution! Whenever the head cover is removed, all four rubber rings and the gasket should be replaced.
Using a thickness gauge, measure the distance between the tip of the crankshaft and the valve bowl.
Take note of the measurement.
If valve clearance is not within the tolerance range, adjust as follows:
Take the engine to the TDC.
Lock the camshafts by using the corresponding timing pins.
- Specific tooling: 020719Y Timing pin
Characteristic:
- Intake valve clearance: 0.11 - 0.18 mm (0.0043 - 0.0071 in)
- Exhaust valve clearance: 0.16 - 0.23 mm (0.0063 - 0.0091 in)
Remove one camshaft at a time
Leave the other camshaft assembled and blocked by means of the timing pin.
Caution! If both camshafts are removed, the engine spins making timing necessary.
Remove the bowl tappets and the adjustment shims using a magnet.
Note. Grease the bowl tappets and the adjustment shims properly each time they are removed.
Replace calibrated pads with a pad thick enough to correct the valve clearance previously detected.
List of calibrated break pads:
- 1. Calibrated pad 2.60
- 2. Calibrated pad 2.65
- 3. Calibrated pad 2.70
- 4. Calibrated pad 2.75
- 5. Calibrated pad 2.80
- 6. Calibrated pad 2.85
- 7. Calibrated pad 2.90
- 8. Calibrated pad 2.95
- 9. Calibrated pad 3.00
- 10. Calibrated pad 3.05
- 11. Calibrated pad 3.10
- 12. Calibrated pad 3.15
- 13. Calibrated pad 3.20
- 14. Calibrated pad 3.25
- 15. Calibrated pad 3.30
- 16. Calibrated pad 3.35
- 17. Calibrated pad 3.40
- 18. Calibrated pad 2.55
- 19. Calibrated pad 2.50
- 20. Calibrated pad 2.45
- 21. Calibrated pad 2.40
Caution! Before refitting head covers, clean head and cover surfaces carefully.
Apply THREEBOND on the head cover perimeter along the gasket housing.
Apply THREEBOND on the head in the areas indicated in the figure.
