I am in the process of replacing my head with one that I got from EBay. This is going into my 81 300SD and When I got the head from ebay they said it was for an 81-85 300SD, no specific year or engine number. Anyways, the timing chain tensioner on the "new" head was broken so I used the one from my "old" head. While tightening the bolts the "old" tensioner broke. Now, my questions.
1. Is there any different sizes for these engines for these tensioners?
2. Does anybody know where I could get one of the "new" styles?

I am attaching two pics the first will be my "old"(Smaller) tensioner and the second will be my "new"(Bigger) tensioner.

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1981 300SD