Tue, Jun 29, 2004, 1:34pm (EDT+4) (Leon)
says:
snipThose plugs are known as FREEZE plugs. If the cooling system water
in the engine block freezes the expanding ice will pop out the plugs to
help prevent damage to the engine. snip

Not quite. "Freeze plug" holes in the engine block are actually
used to empty out sand, used during casting.

JOAT
When you're up to your ass in alligators, today is the first day of the
rest of your life.
- Archchancellor Mustrum Ridcully, UU