Yes, it is possible! I use one form Snap-On tools, that handles diesel
pressures as well as gas engines, it uses an adaptor to fit into the
injector hole, and a threaded hose for the gassers. The gauge itself clips
onto the hose or adaptor with a common air-hose type fitting. Very accurate
on both the gas and diesel Vanagons/Rabbits/others. Price I remember being
around $100?

Karl

> >Should I look for a compression tester that will work on both the Vanagon
> >and the Rabbit?
>
> Not possable. You will need an adaptor for the 14mm spark plug motor. $50
> bucks or so for  minimal quality and accuracy guage, hose and adapter. A
> different guage is required for the diesel. Much higher pressures. Not
> likely to find this at the hardware store. Baum Tools and other
specialists
> will have this. You will also need an adaptor for the injectors and/or the
> glow plug threads for hookup. Up to $80 or so for the good stuff. Probably
> find what you need in the Craftsman line. If US made, could be the
bargain.
> Auction sites could reveal some jewels.
>
> >
> >Where should I look for the compression tester?  Is the rubber tip type
> >adequate or do I really want the type that threads into the spark plug
hole?