How do you replace the alternator in a 1997 Honda Civic EX?
replacing it is a bit of a pain! from the top of the car remove the slide and anchor bolt from the alternater bracket. remove your 3 or 4 pin plug and diconnect the pos power line beside the 3 or 4 pin plug ( on the back of the alternater). now raise the car and from below remove the lower bolt that allows the alternater to swing back and forth. the bolt fits through the housing of the alternater. remove the belt. now the alternater is free. this lower bolt that was just removed attaches to a bracket bolted to the block. remove this bracket and the alternater will slide out of the bottom of the car. complete the above steps in reverse to install new part.
THIS IS HOW I DID IT
This is a general overview of how I replaced the alternator in my 1997 civic LX. Disconnect the negative terminal from the battery. Jack the car up, position your jack stands, remove the driver's side tire. Remove the two bolts from the top of the alternator (12mm & 14mm). Unplug the green connector from the back of the alternator. Remove the terminal wire (the one protected by a black rubber boot) which is held on by a nut.
From the bottom, remove the small bracket (used to keep wiring in place) connected to the alternator by a screw or small bolt. Remove the long slide bolt from the alternator (14mm I believe). The alternator should now be free, from the bottom, push it out of its bracket and position it out of the way. You'll now need to remove that bracket that held the alternator in place (14mm I believe).
Remove the car's oil filter. You'll now be able to slide the alternator out from the bottom. It's a tight fit but it should come out. Before installing the bracket back in the car, make sure the new alternator fits inside of it. The new alternator may not fit and you'll have to adjust the spacers. I used a hammer to do this.
Repeat the process to install the new alternator. To tighten the belt, you'll be using the top 12mm bolt. Using a long tool or crow bar, you can push the alternator towards the fire wall, once you have the correct tightness of the belt, fully tighten the top 12mm bolt. Before starting the car, replace the oil filter and add oil if needed!
Word of caution, I tried two different "remanufactured" alternators from the big car parts store down the street. Both were bad, do yourself a favor, and don't get a remanufactured alternator! Spend the extra money and get a new one, I got mine from KOI/Savage. Best of luck!