I am trying to replace the voltage regulator on our 2002 S80 T6 and ran into problems taking this plastic/rubber covered NUT(attached similar pic found on internet). The plastic/rubber is almost totally torn up on mine, and it appears that the nut it covers is not HEX but round shaped. This is NOT the B+ terminal. The B+ terminal had a plastic/rubber boot that is removable and then a regular hex nut that holds the RED B+ heavy wire.

Does anybody know the function of this plastic covered nut? Why is it covered with plastic (or rubber), and why a round instead of HEX nut embedded in it? Is this some kind of anti-TAMPER device for warranty purposes?(i.e. warranty void if this plastic covered nut is removed).

Is it meant to be removed using a special tool (from Bosch maybe?)?
Thanks.

 

The plastic surrounds the hex, it doesn't hold the plastic down.
Ed

 

Ed,

Thanks for the quick response.
I think it will look like this (new attached pic) once I am able to remove the plastic/rubber covered nut. It looks like a round metal nut embedded in plastic.
I still haven't figured out why they used such a part.

 

Has anybody worked on a volvo or bosch alternator that has this plastic covered nut? Please read the start of thread. Maybe you know the answer. TNX