Got a question.

Before I knew what I know now (very little but learning) about Vanagons (or
waterleakers as many of you wish to call them), I believed that our 1.9 was
replaced with a 2.1.  My latest experience with a water pump made me
question that.  The waterpump was listed as 1.9 engine which is usually
identified as pre-July 1985.  The pump I originally got was for a 2.1 and
naturally, it didn't fit.  The question is--

How does one really know if they have a 1.9 (no matter what the date) or a
2.1?

William