E330D said: Should I be worried about the timing chain failure on a 95 OM606 with 108K miles on it?> Good service hist, oil changed regularly
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I think the general rule for the MB V-8 engine is: the chain, guide rails, and oilers should be replaced every 100K miles or 10 years. Seems the chain rarely fails but the plastic guide rails get brittle and break, dropping into the chain and causing major problems.

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1986 560 SEL (159K miles)