[s-cars] removal of oil drain plug

[Wayne Dohnal]

The first time I tried to change the oil on my S4 I rounded off the head
with a 12-point socket.  I tried all sorts of things without success: Vise
grips, hammer and chisel, heat, slots with hacksaw blade, etc.  What finally
worked was hitting the edge with a chisel on an air hammer.  Didn't take
much at all to break it loose.  I got a new plug and a 6-point Craftsman box
wrench, and haven't had the problem since.  It always takes a lot of force
to break it loose, however.  I kick the end of the wrench with my foot to
break it loose.   It's just the opposite problem of our self-unscrewing
spark plugs.

Wayne Dohnal
1994 S4