M127.982 tach seal

[MarkCan]

Quick question here, on the tach output body on the engine there is a plastic looking seal under the washer. Can it be replaced with the suitable o-ring? See attached pics;
I purchased the full set of gaskets and washers but this one isn’t there.

[stickandrudderman]

It's so easy to replace that you can just try your luck!
Less easy is the oil seal (007997734602) inside that often gets overlooked.

[MarkCan]

Are you referring to the position #162 bellow?
That is another one that was not in my package. I'll add that to my list. The main thing is, I still be able to continue with the engine build.
Thank you

[Charles 230SL]

..Are you referring to the position #162 bellow?..

That's the one - there's a good discussion at: https://www.sl113.org/forums/index.php?topic=32589.msg237099#msg237099, and a picture of the seal here: https://www.authenticclassics.com/Seal-Ring-for-Mercedes-Speedometer-Drive-p/auth-008887.htm
 
I replaced both the Tach seal O-Ring (#133) and the Oil Seal (#162) several years ago. Pictures below are my old one and two new ones.

[stickandrudderman]

Are you referring to the position #162 bellow?
That is another one that was not in my package. I'll add that to my list. The main thing is, I still be able to continue with the engine build.
Thank you

Yes, 162.
you're welcome!

[MarkCan]

Kudos to Dave at my local MB dealer (Mississauga, Ontario, Canada). He came through for me again. Got the o-ring and the seal. I picked it up today and will install tomorrow.
Than I’ll flip the motor, give one last look over everything and put the oil pan back on the block. I think it’s time to start a new thread.🤔