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Originally Posted by embe560sl
All these different opinions on aging, timing chains ( how appropriate a name)..Do all MB engines have the same timing chain longevity or are they all different, depending on year and model? Specifically engine #117 series
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There's tremendous variation in the chain life of MB engines - depending on the path of the chain, the engineering, single versus double row, etc. An early single chain 380SL was lucky to get 75k without a disaster. On the other hand a 104 motor chain is bulletproof - never heard of a failure of an unmolested factory chain. Most technicians recognize this and advise accordingly. I've never heard of a mechanic with a "one interval fits all" recomendation.
The 119 motors tend to be a lot stronger than the 116/117s but still need upper timing chain rails at maybe 100k/10 years. They're plastic and break aparta and cause havoc.