Need a part

[msr1]

I dont have a pic, and my english sucks but ill try to see if someone understands me.
It looks like a black box that connects to the block, where the thermostat is inside and in the upper part you connect a water hose. Cant find it on internet.
Thanks

[nihil]

You didn't mention which engine you have, but it sounds like the rear coolant flange. Does it look like this?

[msr1]

Its a bit different. AMU block.. let me see if i can take a pic