In a message dated 2/10/2011 11:59:45 A.M. Eastern Standard Time,
jrasite@EONI.COM writes:

In my  observation....

I've never seen a 1.9 in the boneyard with a hole in  the case. I've never
seen a 2.1 without one.

Draw your own  conclusions.

Jim

hey Jim  I had a 1.9L with a hole thur the top that still ran,   you could
look into the case and watch the crank going around.  drove it  into the
shop to fix it  later  mark d