I have a 1971 250.

Eng Number 130 923-12

I have some questions on the (not sure of the correct name of this part) so I'm going to call it the "Timing chain sprocket tension arm" . (See 1971 250 2.8L Chain Tensioner bolt.
Posting for photo.

If you have first hand knowledge or experience with building these engines or replacing the top end, or know of where I can get first hand information on this valve train, you knowledge would be greatly appreciated.

Mercedes Benz Classic in not able to find information on this problem.

Thank you,
Fredd.

If you actually asked the question you might receive answers. So far you haven't asked a question in this thread or the one you linked to.

Are you trying to find a replacement bolt? Is the chain tensioner broken? What is the issue? Plain English please, we are not psychic! Not trying to be rude, but having several threads for the same problem without actually making any headway suggests that the right questions are not being asked, or the answers given are not being heeded!

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

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1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

What is your question about the sprocket and/or the arm that carries the sprocket?

FM, this is the third thread that you have started that addresses chain tensioning components. Mike D fixed the oil leak for you, and then you sassed him about the suggestion of doing a bit of research on your own (Matthew 7:7).
If you keep it up, if you talk around the question but do not ask the question, you will be identified as a troll.

So what's your question?

__________________
'82 300TD
'77 6.9
'75 280S
'74 280
'87 Porsche 944 turbo

Since I have no technical assembly information on this engine, and no experience tearing it down or reassembly of it, I'm asking questions blindly.
And any one on this forum with a substantial amount of engine building experience such as I do, would understand this.

My currant question on this currant issue is:

What is the tolenance supposed to be between the end of the chain tensioner sprocket arm shaft and the bolt that meets the end of it from the out side of the front of the head ?

Since I'm not allowed to post a photo of this item, you'll all have to decipher my question from the text I've posted.

The oil leak thread question orginally had nothing to do with this issue. Anybody who read that entire thread should beable to understand that. The oil leak morphed into another completely different issue all together. I mistakenly referred to the "Chain tensioner sprocket arm" as the "chain tensioner". Since MikeD was so helpful with the oil leak, I felt he could be of good assistance on another issue. But as it turned out, he was not able to answer that second issue (or not able to understand it). His best response was Matthew 7:7, which was and is of no help.

Also, this forum will not allow me to post the same photo again to help with explaining the second issue I'm try to conquer. It seems there may only be so much room in cyberspace so using the same photo's are are not allowed.

I have been doing reseach on my own. That's what we're all on this forum (and other forums) for. To ask questions. Get answers. Commuicate and learn from each other.
Now if you don't have the answer, or you just want to admit you don't know or don't understand the issue, you and throw a response such as ""Matthew 7:7" out there.

There has only been one thread posted directly at this problem. That thread is this one your reading on.