I've stripped the threads in the pin that holds the chain rail tensioner in. Does anyone know that part number for this?

Would you describe its position more clearly.... I have my manuals here and will try to find it... from the crank... what clock position is it ?

And it might help if you say what engine you are dealing with ......

I ask because due to what you say you broke.... I think you are using the wrong description of the part.
Tell me as close as possible its location on the engine..

You might can find it by clicking on the parts catalog tab at the top of this page..

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

He has a 300SD, so would be a 617 engine. either a 617.950 or 951.

Would be good to add to your signature what vehicle/s you have.


Think the part is in this diagram

CAMSHAFT AND CHAIN DRIVE. Fits: Mercedes | Mercedes-Benz of South Atlanta

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

That's what I was looking for!
Thanks for finding it even with my poor description of the part.

Which one did it turn out to be ?

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html