[jing]

Had the heat on full blast and was working fine while moving, but when I came to a stop, it was much colder. Figured it's a thermostat going bad.

http://dz310nzuyimx0.cloudfront.net/strapr1/fbd4c45075fa9ffc56cdb8788a6911d5/7475b7b3c07e192e80775ff8ded59f89.png

Is it necessary to replace the gasket as well? There doesn't seem to be a part number in the above listed diagram, unless it comes with it already. If not, maybe liquid gasket will work?

[hud 91gt]

Liquid gasket would work fine. You could also buy gasket material and make your own. Guaranteed there is a part number for it. Call a dealership or Lordco and track one down.

[fliptuner]

Why do people asking for mechanical advice, insist on not posting the application?

Check on a specific forum to get an idea of what they're doing. If it has a bypass hole, make sure it's clocked correctly.

[bcrdukes]

A reverse search on the photo shows it's for a Toyota Matrix/Pontiac Vibe, but for all we know, it could be a BMW. Because cooling system problems. :troll:

[fliptuner]

In that case, there should be a rubber seal that the thermostat slips into, before installing it into the housing. If it's not included, it should be available, separately.