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Timing Chain Replacement


Old 01-31-2006, 07:46 PM
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Exclamation Timing Chain Replacement

Is it prudent to replace the timing chain in a 1996 S320 at a certain mileage interval, e.g., 150,000 miles. Does maintenance of car make a difference? Thx!!

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Old 01-31-2006, 11:21 PM
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1997 S600 Sedan
It's definitely prudent. Whether it is necessary is a topic of much debate. I say why not do it sooner rather than later.

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Old 02-04-2006, 11:00 PM
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1987 300SDL aka the "Money Pit"
Provided the oil was changed, the timing chain on an M104 should be good for a very very long time. When it rolled over 200k it may be worth instpecting for stretch and inspecting the guides. But I wouldn't expect to replace it until the 300k range.

The key to it is maintaince. MB specs out Mobil 1 0w-40, use a high quality synthetic oil and change it every 5k miles.

The 606 diesel which has a similer chain and cam set up to the M104 seems to create about 1 degree of chain stretch every 100k miles. Provided synthetic oil is used of course. I don't know what the stretch limits are on the M104 but I bet it is 3-5 degrees.

Purchase a FSM and read up on it.
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