Martin, I have converted DV to the 90 amp replacement several times. For
the needed longer upper belt I just use a second one of the stock lower
belt, 643 mm. Then the same belt fits in both locations and you can
carry a single spare.

The AL33X and AL27X differ in that the 33 has a W lead for diesel tach.
The 27 sometimes has the W lead but the 33 is always supposed to.
Another difference originally was in how the small blue wire attached
but that distinction seems to have faded.

Mark

Poppie Jagersand wrote:
> Some notes for replacing the original 65A Alternator with a generic Bosch AL 33X 90A in a Diesel Vanagon.
> .........
> Hope it will be possible to buy a 10mm or so longer belt. (In the local FLAPS they can only seem to locate parts based on vehicle type, not dimensions or specs...)
> .........
> Martin (and '82 Westy 1.9TD "Poppie")
>