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Old 09-23-2009, 10:36 AM
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Join Date: Sep 2009
Location: Great State of Texas
Posts: 440
W126 Changing chain

Timing chain has 10deg. of stretch.

So I've got a nice IWIS chain, new guides & a new rail & cover. I pulled the valve covers and all of the guides are pretty white-ish and not very worn - not at all the brown brittleness I was expecting. I'm thinking I may not even replace them, as just a chain roll-in would be much easier.

Do I need to change the tensioner as well? My MB CDs still haven't arrived, so I know squat about the tensioner - is it oil pumped?

There was no slapping or other noises before I decided to change the chain, so I figured I'd just back it out a little (using the small bolts) to make it easier to remove the guide rail & rail cover before I roll in the new chain.

Oh, and I decided to check the chain because I just bought car. 137k miles w/ broken odometer.

A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

Last edited by dhjenkins; 09-23-2009 at 10:51 AM.
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Old 09-23-2009, 10:24 PM
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Join Date: Mar 2007
Posts: 159
What model are you working on?
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Old 09-24-2009, 07:02 AM
Posts: n/a
More precisely, what engine does it have in it?

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