92 protege ac compressor
 

i have a 92 mazda protege and the ac was running cool. one day in the highway i heard a noise like loosing air and felt the ac is blowing warm air. i pull over and check the engine and there is a lot of freon in the shielding under the compressor. i took it to the mechanic and raise it and found out that there is a hole under the compressor. but the thing is there is a thread inside of it so i think there was something there before. i found a picture online and kept thinking that was i'm looking for but i don't know where to get it. here is the picture. please let me know what it is and where can i get it.

I dont have that year protege, so i am not sure where those wires lead. Take another picture so i can see the other side of the comressor where the wires go into the compressor, that may be the pressure sensor for the a/c.

this is the best that i can get... i hope it helps...

http://images.channeladvisor.com/Sel...7/25740__4.jpg
that bolt or nut or whatever it is that i'm pointing on is pressure sensor???

https://www.mazdaforum.com/forum/att...2&d=1249476431

https://www.mazdaforum.com/forum/att...1&d=1249476423

Ha i thought it was the power steering, scratch the pressure sensor.

ohhh.. ok... so what do you think it is? i hope somebody could give an answer for this. it's so hot here in nj.

anyone?? can i just put a regular nut or bolt??

here are the pictures again....

http://img.auctiva.com/imgdata/2/8/6...2_o.jpg?nc=589
http://img.auctiva.com/imgdata/2/8/6...22_o.jpg?nc=93

It's a popoff valve. When the pressure gets too high on the high side it relieves the pressure just like a waterheater does.

ahhh.. thanks! so what if i lost it? do you think i can buy that in autoparts store? can i just put something else like an ordinary bolt ot nut?

I wouldnt put a regular bolt into it, you will probably have to go to a mazda dealer to get it, but i would check an autozone or another place because it will probably be half the price as a dealer part.