h cooling system design, while the Bus and Beetle use and up-right fan shroud ... system. So when VW parts people, books, or parts ... catalogues refer to an engine as type 1, 2, or 3, they are referring to ... the entire engine assembly, not just the long block. In 1972 the ... Bus switched to the gtype 4h engine. It is referred to as a type 4 because ... it was originally designed in 1968 for and fitted to the VW 411/ 412, the fourth ... type of vehicle VW made and thus referred to as the gtype 4h. ... This too was a horizontally opposed four cylinder ... engine, just larger inside and out. This basic engine was used not ... only in the 411/412fs and Bus (from 1972-on), but also in the ...