Larry,
     I was able to replace the temp 2 sensor without
draining the system.   You think if I work fast I can
just swap out the temp sensor without needing to drain
it?
       thanks gary
--- Larry Calhoun <alvorada@citynet.net> wrote:
> Hi Gary,
>
>
>
> I just had the same problem with my 88 van. The temp
> sender was at
> fault. Yes you are right about the two being
> together on the thermostat
> housing. One is for the computer to send info for
> fuel delivery" Temp
> sensor" (blue connector) and the other is for the
> temp gauge, Temp
> Sender ( black connector). I got a new Echlin Temp
> Sender replacement
> from NAPA. It is easy to change and will cost around
> $10. NAPA had to
> order it and it took about a week to come in.
>
>
>
>  I drained the coolant first by carefully unplugging
> the wiring to the
> sender, then pulling out the clip which holds the
> temp sender in place
> to the thermostat housing and removing the sender.
> Have a large pan to
> catch the coolant when you remove the sender.
> Inspect the o ring which
> seals the sender and reuse it if it is in good
> shape, I did and have no
> leaks. But you can change it if you choose. The rest
> of the installation
> is reverse as described above. Refill your coolant
> tank and bleed as
> usual.
>
>
>
>
> Good Luck,
>
>
> Will
>
>

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