Timing chain replacement? - Mercedes-Benz Forum

 
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post #1 of 8 (permalink) Old 06-06-2011, 10:25 AM Thread Starter
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Post Timing chain replacement?

1999 CLK 320 (208 365) 112.940 90k miles

A Mercedes mechanic friend of mine said that I have no need to replace the timing chain at 100K miles, as there are no nylon parts to wear out, and my DVD manual shows the chain looking pretty metal looking. I haven't explored the DVD that thoroughly, as it is pretty damn intimidating and complicated.... I haven't found anything about periodic maintenance related to the timing chain on my engine or model. Could be in there, but I haven't found it. It's the software that the Benz mechanics use, and simply identifying my car/engine/transmission number was a chore, to say the least. Do I need to worry about my timing chain, and is there any maintenance needed to be performed? Thanks.
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post #2 of 8 (permalink) Old 06-06-2011, 10:29 AM
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No worries, really.

The replacement interval is similar to that for piston rings, i.e. when necessary.

Kent Christensen
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post #3 of 8 (permalink) Old 06-06-2011, 10:32 AM
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You will find a lot of opinion on both sides of the issue. I go for replacing the chain at 100K. I had a 1984 380SL with a double row chain that snapped at 104,000 causing $7000 worth of damage. My mechanic laughed when I told him to replace the one on my 500SEL (W140) because he said they were bulletproof. His chain broke a couple of months later. It's not only the chain by the way, the guides are plastic and become brittle with age and heat and when they break they get jammed in the chain.

I always err on the side of caution

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post #4 of 8 (permalink) Old 06-06-2011, 11:52 AM Thread Starter
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timing chain

Yeah, I was afraid of this contradictory information.... I haven't the mechanical where-with-all to replace the timing chain myself. I have 90k at the moment...I wish I had some more thorough info, if simply to calculate my odds of chain failure within a certain mileage accumulation and what it will cost to replace chain vs complete chain failure and associated repairs....obviously MUCH more.
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post #5 of 8 (permalink) Old 06-06-2011, 03:52 PM
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Ditto on careful checking what king of guides you have. My friends junked their Mercedes, because even after replacing the guides, the chain jumped and destroy the valves.
We do own diesel models with 220,000 and 280,000 miles on them. No worry about chain for another half million miles.
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post #6 of 8 (permalink) Old 06-06-2011, 06:07 PM Thread Starter
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The kind of guides I have are the stock guides that obviously were installed when the car was manufactured...did you replace the guides/chain in your diesels with 200k+ miles, and you plan on another 250k miles? Are chain/guide issues any different with diesels than with gasoline engines?
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post #7 of 8 (permalink) Old 06-06-2011, 06:28 PM
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Based on everything I have read on here, there is no need to worry if you don't have any symptoms (aka noise). Timing chains are virtually indestructible on these cars, not like the timimg belts like on my Toyota which require a change at 90,000. My best guess is that at your 85,000 miles you have a way to go.

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post #8 of 8 (permalink) Old 08-13-2016, 11:05 PM
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I have an 02 clk wit 108,000 mi. My engine started making a knocking noise so I took it in to see what was wrong. Was told that it was my timing chain & it was gonna cost $2700 to fix. Is this average price for this type of repair? The mechanic said it was a 3 day job..
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