Replacing the Catalytic Converter on a 1982-1989 Buick Skyhawk
What to know before you buy a new aftermarket catalytic converter for your J-Body Buick.
- Expect a significant loss of power or a rattling sound as the primary symptoms of failure.
- Aftermarket is your only option; a true 'direct-fit' part does not exist and welding will be required.
- MagnaFlow is generally a higher-quality, more expensive choice, while Walker and AP/Eastern are budget-friendly alternatives with mixed reviews on longevity.
- Ensure your engine is running well before replacing the converter to prevent damaging the new part.
Is Your Skyhawk's Catalytic Converter Failing?
On a car from the 1980s like the Skyhawk, catalytic converters can fail in two main ways: they can become clogged, or the internal structure can break apart. A clogged converter creates a major blockage in your exhaust, which can cause a severe loss of engine power. An internally damaged converter will often create a rattling sound from underneath the car.
Common Failure Symptoms:
- Serious Loss of Power: The car may struggle to accelerate or feel extremely sluggish, especially going up hills. This is the most common symptom of a clogged converter.
- Rattling Noise: A rattling or clunking sound from the exhaust, especially on startup or when revving the engine, often means the ceramic honeycomb inside has broken into pieces.
- Rotten Egg Smell: A strong smell of sulfur or rotten eggs from the tailpipe indicates that the converter is not properly processing exhaust gases.
- Failing Emissions Test: This is a clear sign that the converter is no longer doing its job of cleaning the exhaust.
A Note on Check Engine Lights
Your 1982-1989 Skyhawk has a very basic computer system (OBD-I). Unlike modern cars, it does not have a specific trouble code to tell you the catalytic converter is inefficient. You must rely on physical symptoms like power loss or rattling noises to diagnose a failure.
Choosing the Right Aftermarket Converter
Finding a new, original GM catalytic converter for a vehicle this old is practically impossible. Your only realistic option is a new aftermarket part. These fall into a few different tiers of quality and price.
It is important to know that you will likely not find a true "direct-fit" part. The original converters on these cars were often large, pellet-style units, while modern replacements are a more compact honeycomb design. This means some cutting of the old exhaust pipe and welding of the new converter will almost certainly be required.
Aftermarket Brand Tiers for Your Skyhawk
| Tier | Brands | Quality & Cost Assessment |
|---|---|---|
| Better Quality | MagnaFlow, MagnaFlow Performance Exhaust | Generally considered a higher-quality aftermarket option with better materials and construction. They are often preferred by exhaust shops for their reliability. Expect to pay more for the MagnaFlow name, but they tend to last longer than budget options. |
| Standard / Economy | Walker Exhaust, AP Exhaust, Eastern Catalytic | These brands offer a more affordable solution. Walker is a very common brand, but some users report issues with premature rust and weld quality. Eastern and AP are also budget choices, but some have experienced issues with poor fitment and very short lifespans. These can be a viable option if budget is the main concern, but their longevity may be limited. |
Pro Tip: Federal (EPA) vs. CARB
Unless you live in California or another state that has adopted California's strict emissions standards (CARB), you will only need a Federal or EPA-compliant converter. These are less expensive. Always check your local laws before purchasing.
Frequently Asked Questions
Will a new converter fix my power loss?
If your old converter was clogged, then yes, replacing it will restore lost engine power and acceleration. A clogged converter acts like a potato in the tailpipe, preventing exhaust gases from escaping and choking the engine.
Can I install a catalytic converter myself?
This is not a simple bolt-on job for a Skyhawk. Because modern aftermarket converters are a different shape than the originals, cutting and welding are almost always required. If you are not an experienced welder, this job is best left to a professional exhaust shop. The labor cost is usually reasonable.
Why did my original converter fail?
After 35+ years, simple age and mileage are the most likely cause. However, converter failure can also be caused by other engine problems. An engine that burns oil or has ignition misfires can send unburned fuel into the exhaust, which can overheat and melt the inside of the converter. It's a good idea to make sure your Skyhawk's engine is running well to protect your new converter.
Are there any recalls for the Skyhawk catalytic converter?
No. There are no active or historical recalls specifically for the catalytic converter on the 1982-1989 Buick Skyhawk. Any safety recalls from that era would be long expired.
Technical Specifications
Fitment is dependent on engine size (1.8L or 2.0L) and specific model year. All replacements are universal-style and will require professional installation with welding.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Buick Skyhawk: