Dana. 

Bernie at Montgomery Auto Parts in Calgary (VW, Audi,Porsche) recommended the W719/5 filter. It has a spring and check ball located in the center of the filter just below the mounting threads. I do not have noisy lifters even if the van sits in the garage for weeks or more. 

George 

'85 Westfalia

> >It seems that the "regular" Mann oil filter part number for air-cooled
> >Vanagons is 920/17 but I've also seen a more "generic" reference to Mann
oil
> >filter 719/5.  Does anybody know the differences between these two
filters
> >and if the 719/5 will really work for the air-cooled Vanagons?