Thermostat housing.
Brass base, powder blue plastic on mine. Next to a similar unit with
one wire feeding it.
The sensor with 2 wires going to it.
Not much and there's nothing to clean. It's a sealed unit.

Jim

On Dec 9, 2011, at 7:16 PM, Richard Koerner wrote:

> Embarrassing question:  Where on an 85 1.9L motor with a manual
> transmission is the Temp Sensor 2?  (got it on my list to clean the
> contacts and maybe even replace since it's 25 years and 194,000
> miles old)  What does it look like?  What color wires, and how many,
> are leading to it?  If you remove it does coolant flow out?
>
> Rich
> San Diego