yesterday my water pump belt broke and, as it whipped around, broke the
metal tube that the dipstick slides into.  it shattered all the way at
the bottom where it appears to slide into a larger round piece that i'm
assuming held it to the block.  i stuck a cork into the hole in order to
get home.  so now i'm wondering if i can use the van to get to work on
monday...  does anyone know how much the oil splashes up to the bottom
of the dipstick hole?  is that cork going to get blasted out by oil, and
if it does, will i lose a lot?  has anyone ever tried running without
the dipstick tube and observed how much oil splashes from that hole?

also, does anyone know the part number for that piece?  how about
removal and installation?  will the piece that's still in the engine
come out if i pull on it with pliers, and do i just shove the new one in?

thanks!

Ben.