W114 stretched chain - Mercedes-Benz Forum

 
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post #1 of 10 (permalink) Old 08-17-2013, 08:20 PM Thread Starter
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W114 stretched chain

So,
i was adjusting the valves from 0.007 to 0.008 today and had a chance to find the marks for the timing chain.
this thing is not aligned.

how bad is this and could this be causing my "knocking\pinging"?

here is a video of the chain when cylinder 1 is tdc.

W114 timing chain mark - YouTube
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post #2 of 10 (permalink) Old 08-18-2013, 06:26 AM
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It's been a while since I worked on a M130 but that D.S. chain guide doesn't look "right". Anybody else got a M130 they can take a look at to confirm?

You did only rotate the engine clock-wise when you adjusted the valves, correct?
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post #3 of 10 (permalink) Old 08-18-2013, 07:08 AM Thread Starter
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Correct
Nothing but clockwise


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post #4 of 10 (permalink) Old 08-18-2013, 08:17 AM
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Normally you would put the camshaft on its mark and then look at the position of the crankshaft. The chain should not be slack if the engine has been turned over clockwise.
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post #5 of 10 (permalink) Old 08-18-2013, 08:18 AM
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by tdc do you mean the crank mark is on "0"?



there are offset woodruff keys that will take back up to 5 deg of chain stretch.

the right side chain where you wiggle it should be tight as that it the way the engine turns and pulls the chain. are u sure you are turning crank bold clockwise?

i think you turned engine wrong direction
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post #6 of 10 (permalink) Old 08-18-2013, 09:28 AM Thread Starter
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Looking at the engine directly from the front to the right


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post #7 of 10 (permalink) Old 08-18-2013, 11:19 AM
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So I checked mine and the timing chain along that rail is tight. Moves left and right maybe 1/8" Check out the pics. Theses were shot with the iphone looking into the oil filler cap.

I think you may have found the source of your noise my friend.
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Last edited by Luna Gaudi's 72 250; 08-18-2013 at 11:36 AM.
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post #8 of 10 (permalink) Old 08-18-2013, 11:21 AM
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as govert said, line up cam marks and then look at crank to see degrees of stretch.

not sure your last post, but yes, standing in front of engine turn clockwise.
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post #9 of 10 (permalink) Old 08-18-2013, 11:26 AM Thread Starter
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So my question is if the chain is trenches do I need to take the engine out to replace?


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post #10 of 10 (permalink) Old 08-18-2013, 11:39 AM
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no, it can be threaded on. the 5 deg cam key will correct 10 deg at the crank.
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