I got my engine out of my '89 190E 2.6 and found these in the oil pan. I broke a timing chain so one of the parts is half of one roller that was missing from the chain. But what is the second part?

As you see, it is quite small. One end is threaded and the other has a tapered head with a very small allen socket in it. I don't know of any part in the engine that has anything like this.

Suprisingly, it is the same size as the interior of the chain roller and about as long. I've never heard anything like it, but it almost looks like it could have been the pin that goes in the roller. I know it isn't though because the pin is intact on the other end of my broken chain.

Can anyone help?

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)