| Checking hydraulic valve compensation elements |
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| The hydraulic compensation elements cannot be serviced. |
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| Irregular valve noises when starting engine are normal. |
| Special tools and workshop equipment required |
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| Start engine and run until radiator fan has started up once. |
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| Increase engine speed to approx. 2500 rpm for 2 minutes (perform road test if necessary). |
Note | If irregular valve noise disappears but repeatedly re-occurs when travelling short distances, renew oil retention valve. The oil retention valve is located in the oil filter bracket → Item. |
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| If the compensation elements are still noisy, locate the defective compensation element as follows: |
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| Rotate crankshaft by turning bolt for toothed belt sprocket until cam of supporting element to be tested is facing upwards. |
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