In my quest to find the ticking noise in my motor, i changed the timing chain tensioner. this did not fix the problem. Just now i was looking at the engine with the valve cover off and noticed that the timing chain tensioner does not line up with the spot on the banana rail where its supposed to. It definitely is not right where can i tighten the banana rail?

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1979 240D with a 617 turbo diesel.

The proper term is "tensioning rail".

It does not get tightened in the conventional sense. It pivots on it's lower mounting bolt. The chain tensioner forces the rail into the chain and keeps tension on the chain.

There is no adjustability short of replacing the rail, however, it's unlikely to solve your issue.

hhhm maybe the problem lies in the new tensioner. I will try to put some pictures up.

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1979 240D with a 617 turbo diesel.

I've seen this before. I don't think there is alot you can do about it.

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Jim

The head of the old tensioner has a deep half circle groove in it. The head on the rail appears to be worn at an angle so the new tensioner only touches it on one side. I looked at my parts engine and it has no side to side play and lines up right.

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1979 240D with a 617 turbo diesel.

You'll probably need a new rail for them to line up properly then.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I think i will do that before driving it anywhere. The side to side play is so bad that one side of the chain is not even on the rail.

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1979 240D with a 617 turbo diesel.

Yikes, I agree, don't run it that way, it'd snap for sure!

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

this is exactly what my engine looks like. I love this forum!

http://www.peachparts.com/shopforum/attachments/diesel-discussion/45828d1183949517-timing-chain-tensioner-rail-replacement-mercedes-073.jpg

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1979 240D with a 617 turbo diesel.