That looks like the correct bolt for your filter housing part #.
It uses 2 "O" Rings and the Aluminum Washer.

If you had the Filter Housing with the #02 in the part #, then
You would use One "O" Ring and no Aluminum Washer.

Iam pretty sure the 84 SD would have come with the filter housing with the 02#.
maybe someone before you changed the engine with an older one?

Charlie

__________________
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