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  #1  
Old 06-04-1999, 01:10 AM
TOM
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AFTER REPLACING THE TIMING CHAIN AND INSTALLING THE UPDATED CHAIN-TENSIONER ABOUT HOW MANY MILES BEFORE THE CHAIN WILL OUNCE AGAIN REQUIRE REPLACEMENT ON THE 190E 16V-86
  #2  
Old 06-04-1999, 01:19 AM
MB STARS
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Mercedes recommend 100,000 miles between timing chain replacement.
  #3  
Old 06-04-1999, 01:22 AM
RAE190
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Good question, ask ten different people, get ten different answers. According to Mercedes you should replace the timing chain every 50K miles. Some people say even longer, others say less. Even still some say a timing chain never needs to be replaced. I feel inline with Mercedes. I think 50K miles is a little early, but I would rather replace it before it starts to fatique. I recently replaced mine (with the updated tensioner), I will replace the chain in about 50K miles.
By the way, did you replace the front engine cover (which includes an updated oil pump) with the new updated one when you did the timing chain? It has been updated four times and is important to replace because, the old one did not get enough oil to the timing chain. That will cause your timing chain to fail before 50K miles. The new front engine cover and oil pump get a lot more oil to the timing chain.

------------------
Adrian Eckenrod
MBCA, PCA, BMWCCA & SCCA* member
86 190 2.3-16
83 944 ITS Racer
  #4  
Old 06-04-1999, 12:43 PM
TOM
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NO I DIDN'T, BUT I WILL LOOK INTO THAT!

RAE, WHAT ARE THE DIFFERENCES YOU CAN PHYSICALLY SEE BETWEEN THE OLD AND UPDATED CHAIN TENSIONER AND FRONT ENGINE COVER?
  #5  
Old 06-04-1999, 10:29 PM
M.B.DOC
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Mercedes hasn't ever issued a mileage or time schedule to replace the timing chain!!!
The only engine that has ever had a scheduled inspection mileage is the 190E 2.3.
It is suggested that the timing chain be inspected for excessive stretch whenever the valve cover has been removed.
The more frequent oil changes the less chance of failure of the chain & other related items.

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MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS M.B. TECH
  #6  
Old 06-04-1999, 11:24 PM
Benzmac
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I have to agree with MB DOC on this...Mercedes has never said to replace a certain intervals, but to check for wear and stretch. Usually they will live to and beyond 100k. (My 300E had 206,000 miles on it when sold and I never put in a chain. It had 2 degrees stretch when sold. But perfect service history!)

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Benzmac:
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  #7  
Old 06-05-1999, 03:52 AM
RAE190
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I don't remeber what MB service book I saw the 50K mile replacement in, but I saw it when I was looking up information about my car. That is when I learned about the defective tensioner and had mine replaced (this was when I first got the car). Perhaps the 16V, being a more performance car (with much of its life spent in high rpm's) had a suggested replacement time. I too agree the chain will last well beyond 50K, even 100K miles. But I do a lot of hard driving with my car, a good part of its life is spent on the track. So in keeping with the general race car rule (replace major parts ie. bushings, belts, chains, etc) at least every two years, I will replace my timing chain in 50K miles. Or the next time I am in the engine.
Tom, I don't remember the physical differences between the front engine cover but there are some. I had mine replaced two years ago. The difference in the timing chain tensioner is one of them has a spring. I beleive it is the old tensioner that has the spring. There have been three different designs of oil spray nozzles for the timing chain. The last of which was designed in July of 87. Its part number (for injection engines) is 102 180 08 43

------------------
Adrian Eckenrod
MBCA, PCA, BMWCCA & SCCA* member
86 190 2.3-16
83 944 ITS Racer
  #8  
Old 06-06-1999, 09:43 AM
M.B.DOC
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The 16v 190E is the last car to require valve adjustment, so the valve cover is supposed to be removed every 15K miles. By M.B. standards inspect the chain for stretch every time the valve cover is removed means every 15K. Again no mileage schedule for timing chain replacement but the stretch of the chain dictates replacement.
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