My experience wasn't so fun the first time with a face full of coolant from
underneath. :(

The biggest problem was that the stupid sender grommet stuck in the hole
and didn't
come out with the sender so be ready for that.   I'd just put a tub
underneath to collect the
drippage as much as you can and do the swap as quickly as you can.   But
have a needle
nose plier or something similar for yanking the grommet out ready if it
doesn't do so.

Steven
91 Westy

On Mon, Jan 26, 2015 at 8:53 AM, Stuart MacMillan <stuartmacm@gmail.com>
wrote:

> Still chasing bugs in my son's '87, and I'm going to replace it and the O2
> sensor.  It's got erratic high idle, stumbling when cold, and I think it's
> running rich when warmed up.
>
>
>
> Just wondering if there is a way to minimize coolant loss.
>
>
>
> There are a lot of pipes into the T-stat housing, and I can't clamp them
> all
> off.  And, does the O-ring tend to stay in the bore and need to be hooked
> out, or will it come out with the old sender? I'm going to replace it.
>
>
>
> I may just use this as an excuse to flush and replace the coolant if I'm
> going to lose a lot anyway.
>
>
>
> Thanks!
>
>
>
> Stuart
>