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How to Replace Exhaust Manifold with Catalytic Converter 96-00 Honda Civic

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How to Replace Exhaust Manifold with Catalytic Converter 96-00 Honda Civic

Created on: 2013-12-20

Watch this 1A Auto how-to video and you can learn how to replace the exhaust manifold and catalytic converter on your 96-00 Honda Civic.

  1. step 1 :Removing the Upstream Oxygen (O2) Sensor
    • Remove the O2 sensor with an O2 sensor socket and ratchet
    • If the O2 sensor will not remove, cut the O2 sensor wire and remove it with a 7/8 inch socket
  2. step 2 :Loosening the Exhaust Manifold from the Engine
    • Remove the two 12mm bolts from the heat shield
    • Remove the nine 12mm nuts from the exhaust manifold
    • Remove the 14mm bolt from the catalytic converter bracket
    • Remove the 10mm bolt from the oxygen sensor bracket
  3. step 3 :Removing the Downstream O2 Sensor
    • Disconnect the o2 sensor wiring harness
    • Pull the harness off of its bracket
    • Remove the O2 sensor with an O2 sensor socket and ratchet
    • If the O2 sensor will not remove, cut the O2 sensor wire and remove it with a 7/8 inch socket
  4. step 4 :Removing the Catalytic Converter
    • Raise and secure the vehicle
    • Remove the three 13mm bolts from the catalytic converter
    • Pull the catalytic converter up and out
  5. step 5 :Preparing the New Catalytic Converter
    • Remove the two 12mm bolts from the new heat shield
    • Pull the heat shield off the new catalytic converter
    • Remove the 14mm bolt from the old catalytic converter bracket
  6. step 6 :Installing the New Catalytic Converter onto the Engine
    • Pry out the old catalytic converter gasket with a flat blade screwdriver
    • Push a new gasket into the exhaust pipe
    • Pull off the old exhaust gasket
    • Hang a new exhaust gasket on the studs
    • Thread the nuts off the bottom of the new catalytic converter
    • Push the new catalytic converter into place, lining up the studs with the exhaust pipe flange
    • Push the exhaust manifold onto its studs
    • Fasten the nine 12mm nuts onto the exhaust manifold
    • Tighten the 12mm nuts to 25 - 30 foot-pounds of torque
    • Put the bracket into place on the catalytic converter
    • Insert the 14mm bolts into the bracket
    • Put the heat shield into place
    • Insert the two 12mm bolts into the heat shield
  7. step 7 :Reinstalling the Upstream O2 Sensor
    • Put the O2 sensor into place
    • Tighten the 02 sensor with the O2 socket
    • Insert the 10mm bolt into the oxygen sensor bracket
  8. step 8 :Fastening the Catalytic Converter to the Exhaust Pipe
    • Fasten the three 13mm nuts onto the catalytic converter
    • Tighten the 13mm nuts to 25 - 35 foot-pounds of torque
  9. step 9 :Reinstalling the Downstream O2 Sensor
    • Thread the O2 sensor into place
    • Tighten the 02 sensor with the O2 socket
    • Reconnect the O2 sensor wiring harness
    • Clip the harness into its bracket

Tools needed for replacement

  • General Tools

    Jack Stands

    Floor Jack

  • Materials, Fluids, and Supplies

    Rust Penetrant

  • Pliers, Cutters & misc Wrenches

    Wire Cutters

  • Ratchets & Related

    A Piece of Pipe (for leverage)

    Torque Wrench

    Ratchet

  • Screwdrivers & Related

    Flat Blade Screwdriver

  • Sockets - Metric

    12mm Socket

    13mm Socket

    14mm Socket

    10mm Socket

    11mm Socket

  • Sockets - SAE

    7/8 Inch Socket

  • Specialty Tools

    O2 Sensor Socket

Installation Video
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Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Don from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace the exhaust manifold and catalytic converter on this 1998 Honda Civic. Pretty much the same process for the Civics from 1996 to 2000.You'll need a new manifold and catalytic converter assembly from 1AAuto.com, 10 to 14mm sockets and ratchet with an extension, a 7/8 O2 socket, a piece of pipe for leverage, torque wrench, jack, and jack stands. If you have trouble with your O2 sensor you can use clippers that clip the wire and then use a regular deep 7/8 socket to remove the O2 sensor.

Start off using your 7/8 inch O2 socket to remove your upstream O2 sensor here. Just put the socket on the O2 sensor, and then, with a ratchet and an extension, put it down into the socket and remove that sensor. Once it's removed, just set it aside. If you can't get your O2 sensor off with your O2 socket, there is always plan B. Just cut the wire on the O2 sensor and use a regular 7/8 inch socket. If you are forced to do this, you will have to buy a new O2 sensor.

Then you want to remove these two 12mm bolts. Now you need to remove these nine 12mm nuts. We'll fast forward here. We doused them with penetrating oil, let them sit for a little while and now we're just removing them with a socket, ratchet and extension. Now, right here there's a 14mm bolt, just go ahead and remove that. Under the hoses, on this bracket, there's a 10mm bolt. Go ahead and remove that. Then pull those hoses back once you have that bolt removed.

Now lift your vehicle and under here you'll see your downstream O2 sensor. You want to use your O2 socket and just remove that. Once it's removed, just set it aside. Again, if your O2 socket isn't working, you can always cut the wire and use a regular one but you will have to replace the sensor.

Next to where your downstream O2 sensor is, there are these three 13mm nuts go ahead and remove those. You can see we doused them with penetrating oil. If you break these off, it's not too big of a deal because the new manifold and catalytic converter assembly from 1A Auto comes with new studs. Once those bolts are removed, you can maneuver your catalytic converter up and out.

On the right, is the old catalytic converter. On the left, is the new one from 1A Auto. You can see that the gaskets are exactly the same and on the catalytic converters, the heat shield is a little bit different but they'll mount exactly the same. Before you can install the new catalytic converter, you need to first remove these two 12mm bolts so you can get this shield off. Next you need to remove this 14mm bolt securing this bracket to your old catalytic converter. We'll fast forward as Don does this. Now to remove this lower gasket, just use a flat blade screwdriver and pry it out and put your new one down into place.

Pull off your exhaust gasket and put your new one into place there. Just take the nuts off the studs on the bottom and put them aside, then lower your manifold and converter assembly down in. Make sure that you line up the lower studs into the exhaust pipe flange and get them into place. Once you make sure those are in place then line up your top ones and push the manifold on. I'm just going to keep fast forwarding here as Don puts all the nuts back in place and preliminarily tightens them. Use a torque wrench and torque all those nuts to 25 to 30 foot-pounds.

Take the bracket from your old catalytic converter and bolt it to your new catalytic converter. Then replace the bolt from that bracket into your engine. We'll just fast forward as Don tightens those up. Reinstall the heat shield with the two 12mm bolts. Reinstall your O2 sensor, and tighten it up with the O2 socket. Once you have it tight, reconnect the harness. Place the 10mm bolt underneath those hoses and tighten that up. Now, under the car, replace those three 13mm nuts. Again tighten these to 25 or 35 foot pounds, maybe a little more, if you need to. Then, twist your O2 sensor into place and tighten it up with your O2 socket, reconnect the harness and attach it to the bracket and you are all set.

We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    General Tools

  • Jack Stands
  • Floor Jack

  • Materials, Fluids, and Supplies

  • Rust Penetrant

  • Pliers, Cutters & misc Wrenches

  • Wire Cutters

  • Ratchets & Related

  • A Piece of Pipe (for leverage)
  • Torque Wrench
  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 12mm Socket
  • 13mm Socket
  • 14mm Socket
  • 10mm Socket
  • 11mm Socket

  • Sockets - SAE

  • 7/8 Inch Socket

  • Specialty Tools

  • O2 Sensor Socket

1995 - 1998  Honda  Odyssey
1995 - 1999  Isuzu  Oasis
1988 - 1991  Honda  CRX
1988 - 1989  Honda  Civic
1996 - 2000  Honda  Civic
1996 - 1997  Honda  Civic Del Sol
1998 - 2002  Honda  Accord
1999 - 1999  Honda  Civic
1998 - 2000  Honda  Civic
1996 - 1997  Honda  Civic
1990 - 1993  Honda  Accord
1997 - 1997  Honda  Accord
1995 - 1997  Honda  Accord
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