Chances are your models tensioner has no ratcheting ability. The early ones did not for many years than the feature appeared. I was not aware it was discontinued for whatever reason as it seemed logical.

Basically if the tensioner failed or recieved no oil pressure from the feed passage it could not retract enough because of the ratcheting function to leave a very loose chain running.

This meant you had to extract the rachet from the front of the tensioner by pushing it through and reinsert it again from the back. Then extend it or perhaps the oil pressure did. The new chain being shorter in length meant the tensioner was extended out further than needed for the new chain when removed from the old chain.

I suspect the ratchet part was introduced as there may have been difficulties pointing towards a failed tensioner. Why the feature appears to have been eliminated must be a story as well. The illustration posted did not show a ratcheting function involved in that tensioner that I noticed. So I have to assume the feature has been dropped.

I also posted a suggestion on your other thread to the effect that if the old tensioner was changed just as a preventative measure. Install the old one to see if the noise is gone. Also compare part numbers between the old and new.