How to Replace the Catalytic Converter on a 1997 Ford Ranger

Replacing the catalytic converter on a Ford Ranger will result in cleaner emissions from the exhaust system. The replacement of the converter will also help the truck pass any required emissions testing. The O2 sensor can be replaced at the same.

Difficulty: Moderate

Instructions

Things You'll Need:

• WD-40
• Jack
• Jack stands
• Socket wrench
• Socket set
• Catalytic converter
• Gaskets

Remove the Catalytic Converter

1. Jack up the truck. Room is needed raise the truck from both the front and rear. Place the truck on jack stands to keep it stable while working underneath.

2. Locate the pipe running underneath to the catalytic converter. The converter will be before the muffler going toward the back of the vehicle.

3. Spray the two football looking fittings on the front end of the converter and the back end with WD-40. Let these bolts soak for an hour or so to help loosen them and then unscrew them with the socket wrench.

4. Remove the O2 sensor on top of the pipe coming out of the converter. If money and time permit, replace that as well. It will improve your emissions testing results.

5. Unscrew the bolts on the flange going into and leaving the converter. There will be two bolts on each flange. The converter will drop when you remove these flange bolts.

Install the Catalytic Converter

6. Place the new converter where the old one was. Be sure the flange gaskets are secured on the new pipe. Use silicone to make sure it stays while you tighten the pipe.

7. Match the bolts up on the front and the back end of the converter. Tighten the bolts.

8. Replace the O2 sensor, or install a new one, on the rear pipe.

9. Lower the truck, start it up and inspect for leaks by looking for traces of smoke or abnormal noise from the exhaust system.

Tips & Warnings

• There is a frame rail that runs right through the middle of the converter. You can remove it for easier clearance. The converter can be worked around it though.
• Be sure the exhaust system is cool before working on it, or you could get burned.

References

• Autozone Tutorial for Replacing the Catalytic Converter

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