Mine leaked a little too when I got it.
I tried a new O-ring. It still leaked.
My sensor looked cracked, so I replaced it. Still leaked.
Closer inspection revealed some tiny cracks in the tank
itself, near the sensor. If I mopped up the coolant, and
watched with a bright light while the engine warmed up
I could see the coolant slowly ooze out of several *tiny*
cracks in the tank and run down into the low spot where
the sensor is.

Replaced tank. No leaks.

Inspect everything closely before you buy anything...

Steve

At 11:39 AM 6/30/2003, you wrote:
>Even with a new sensor and o-ring I had a leak too.
>I used some plumbers tape around the threads.  So far so good.
>
>
> >>> John Rodgers <j_rodgers@CHARTER.NET> 6/30/2003 1:31:24 PM >>>
>In every instance I've expereiced the coolant around the coolant level
>sensor, the sensor itself had a crack in it. Give it a careful
>inspection using a magnifying glass. Your problem may be a crack, not
>an
>"O"- ring.
>
>John Rodgers
>88 GL Driver
>
>
>
>Lee Kouns wrote:
>
> >I'm getting coolant leakage around the coolant level sensor in my
>'87.
> >I'm guessing that I need to replace the seal (o-ring?) for the
>sensor.
> >Any suggestions on the best tool to use would be appreciated. I
>assume
> >that removal of the whole tank is not necessary.
> >Thanks in advance,
> >Lee Kouns