| Checking hydraulic bucket tappets |
| Special tools and workshop equipment required |
Note | t
| Renew defective bucket tappets complete (cannot be adjusted or repaired). |
| t
| Irregular valve noises when starting engine are normal. |
| –
| Start engine and run until engine oil temperature reaches approx. 80 °C. |
| –
| Increase engine speed to about 2500 rpm for approx. 2 minutes. |
| If the hydraulic tappets are still noisy, locate defective tappet as follows: |
| –
| Remove upper part of intake manifold. |
| Continuation for all engine codes |
| –
| Remove cylinder head cover. |
| –
| Rotate crankshaft clockwise until cam of tappet to be checked is pointing upwards. |
| –
| Determine play between cam and bucket tappet. |
| –
| If play exceeds 0.1 mm, renew bucket tappet. If play is less than 0.1 mm or there is no play, continue with check as follows: |
|
|
|
