>
>In fact the T3 engine IS a modified Type 1, adapted for watercooling;
>NOt a Type 4. The crank is interchangable with a Type 1.

Really? I was under the impression that the 1.9 and 2.1 wasserboxers were
derived from the same aluminum-cased  2.0 air cooled engine that preceded
them. Didn't the 2.0l "pancake" aircooled originally come from the Type 4?
Can't say as I see how the wasserboxer bears a greater resemblance to the
Type 1 engine, what with it actually having an oil filter and not having a
pile of parts stacked vertically above the intake manifold. The crankshaft
doesn't determine the engine type, does it?