E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Timing Chain, How loose is too loose?

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Old 09-28-2006 | 03:03 PM
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myfirstbenz's Avatar
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89 300TE, and 68 280sel
Timing Chain, How loose is too loose?

When I put a new valve cover gasket on my m103, I noticed that the timing chain was loose, it has 130k on it. There was say,1/8 to 3/8's play. Is that too much to drive on?

I had heard that you can reset the timing chain tensioner which I can do. I would change my chain right away, but being back at school, I don't have anyone to help hold the chain when I guide it through with the old one. I would hate to take it to a shop since I can do the work myself.
Old 09-28-2006 | 03:09 PM
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1990 300ce 24v I6
Id be careful, no one likes a loose goose
Old 09-28-2006 | 06:41 PM
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Originally Posted by Saijin_Naib
Id be careful, no one likes a loose goose
Yes, very insightful Brett.

I tried to look up tolerances for the timing chain for the m103 engine, but there are no instructions for "checking" the timing chain, only replacing it.
Old 09-28-2006 | 09:35 PM
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Well, I am riding my bike a lot these days and only driving once a week to the store, so I guess I'll be fine till Thanksgiving. I don't rev it and hot wheel it around town so I should be fine.

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