| Checking hydraulic bucket tappets |
| Special tools and workshop equipment required |
Note! | t
| Renew defective bucket tappets complete (cannot be adjusted or repaired). |
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| Irregular valve noises when starting engine are normal. |
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| Start engine and run until radiator fan has switched on once. |
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| Increase engine speed to about 2500 rpm for approx. 2 minutes. |
| If hydraulic bucket tappets are still noisy, locate defective tappet(s) as follows: |
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| Remove pressure hose between combination valve and secondary air pump motor -V101- and unclip pressure hose from brackets. |
Note! | Press buttons on hose couplings to do this. |
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| Remove cylinder head cover. |
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| Rotate crankshaft clockwise until cam of tappet to be checked is pointing upwards. |
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| Determine play between cam and bucket tappet. |
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| If play exceeds 0.2 mm, renew bucket tappet. If play is less than 0.1 mm or there is no play, continue with check as follows: |
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