Ok, think I found out why my A/C wasn't working. Yesterday coming home I heard a noise, got home opened hood and the Idler Pulley was off the car laying down in the engine. I got it out and it is all scared up. Gonna run to Auto Zone and get another. My question is What size is the nut that holds that on there? Must be on the interstae or something. Also is there a washer or Lock washer on it? I know its metric but need to know what size and thread if anyone can help?

 

The nut is somewhat ordinary (I think M10 threads and 14 mm hex) but there are 2 or 3 special washers and spacers involved. If those have been lost, you'll have to get them from a dealer or a junked car. I think they are the same on every Civic throughout the 1990's. Go to hondaautomotiveparts dot com for a drawing of how it goes together.