I am putting my 1983 300d back together after a nightmare job of dropping timing chain when doing maintenance. I am almost back together but I have a part that I am not sure of. I am attaching a picture if you can help.

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Dowel pins? that hold guide?

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Looks like pins from the timing chain. Did you have to cut a link to remove it?

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

These pins are around 2 inches long and half the diameter of a pencil

my guess is chain guide pins as well

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1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5

Are the ends threaded?

It's been a long time since I did one of those chains but for some reason I'm remembering the actual guide rail has a couple of pins which look similar. They hold the metal side plates together. Could just be my bad memory though. I believe the tensioner just pushes on a "shoe" but on the other side of the gear it is an actual guide assembly where the chain passes through a "sandwich" style assembly.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

I do not think these are guide pins, they are not threaded on the ends, they are solid pins.