Hello All

I picked up a later type Tensioner and believe it well work on my 1980 M28/13
928 US. Hope that is correct ?
Anyway Can anyone tell me the correct way to bleed this Tensioner ? and any Tip's to do such .
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I presume you do it on the Car as it has a chamber for Oil that fit's to the block.
(1) Is that correct ?
I well order a new Gasket . Can I use a non Harding sealer on that Gasket ?
(2) Seal the Gasket or not ?
(3) what Oil ? 90 W or some other ?
(4) What about the Adjustment Bolt during "Bleeding " ? Back it off ? or does that matter ?
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Perhaps I am on the wrong Track here ? is the early type a better Tensioner ?
Photo of type I am asking about ( Late Type )
Thanks in advance