Choosing the Right HEI Distributor for Your 1980-1986 Chevrolet Impala
Everything you need to know before replacing the distributor in your classic Impala.
- Your Impala uses an HEI distributor with a built-in coil; failure often causes stalling when hot or a no-start condition.
- For most stock engines, a mid-tier replacement from a brand like Pertronix or a quality store brand offers the best value.
- Budget brands like Cardone have a high rate of reported failure; spending a little more on a better brand is wise.
- Replacing the distributor is a DIY-friendly job, but you must use a timing light to set the timing correctly afterward.
Signs of a Failing Distributor
A bad distributor in your Impala can cause problems that leave you stranded. The internal parts, like the ignition module and coil, can fail from heat and age. If you notice any of these signs, your distributor might be the problem.
- Engine Won't Start: The most serious symptom is an engine that cranks but never starts. This happens when there is no spark.
- Stalling When Hot: Your car might start and run fine, but then stall after the engine warms up. It may restart after cooling down for a while. This often points to a failing ignition control module inside the distributor.
- Rough Idle and Misfiring: The engine may shake, stumble, or run poorly at idle and at speed.
- Loss of Power: You might feel that your Impala is sluggish and doesn't accelerate like it used to.
Heat is the Enemy
The ignition control module inside the HEI distributor is very sensitive to heat. Failure is often heat-related. When replacing just the module, it is critical to apply thermal paste to help transfer heat away from it. Skipping this step will cause the new module to fail quickly.
Choosing the Right Aftermarket Distributor
For a car from this era, new original GM parts are not readily available. You will be choosing from new aftermarket distributors. Quality and price can vary a lot, so it's important to know what you're buying. They generally fall into three tiers.
Tier 1: High-Performance Brands (MSD, Edelbrock, FAST)
These brands are for owners who want the best in performance, reliability, and adjustability. They are the most expensive option but are built with high-quality components. Brands like MSD are known for their strong, reliable spark at high RPMs and are often used in performance and racing applications. Edelbrock and FAST also offer high-quality distributors that are popular for performance builds. If you have a modified engine or simply want the best and most durable parts, these are the top choice.
Tier 2: Quality Replacement & Mild Performance (Pertronix, Accel, some store brands)
This tier offers a good balance of quality and price. Pertronix is a well-regarded brand that offers reliable distributors, often at a lower price than MSD. Accel has a more mixed reputation; some users have great success with them for street vehicles, while others report failures. Their cast-housing units that mimic the original GM design are often considered a solid choice for stock replacement. Higher-end store brands, like those from JEGS or Summit, can also fall into this category and provide good value.
Tier 3: Budget-Friendly Brands (Cardone, WAI Global, unbranded)
These are the most affordable options. Brands like Cardone and WAI Global produce new distributors that are meant to be direct, low-cost replacements. However, owner reviews are very mixed. While some people have no issues, many report that these parts fail quickly or are even dead out of the box. These parts might get a car running in a pinch, but their long-term reliability can be a gamble. They often use lower-quality electronic components which are the most common failure points.
Pro Tip: Check the Gear
When buying a new distributor, make sure the gear at the bottom is compatible with your engine's camshaft. Most stock 1980-1986 Impala engines use a cast iron flat-tappet camshaft, which requires a standard iron distributor gear. If your engine has been modified with a steel roller camshaft, you will need a distributor with a compatible bronze or melonized steel gear to prevent rapid wear.
Cost of a New Distributor for 1980-1986 Impala
| Part or Service | Estimated Cost |
|---|---|
| New Aftermarket Distributor | $111.58 - $776.20 |
| Shop Labor | $150 - $300 |
| Total Estimated Cost | $261.58 - $1076.20 |
Cost estimates are for informational purposes and may vary based on your location and the specific parts chosen.
Frequently Asked Questions
Is replacing the distributor a DIY job?
Yes, for someone with basic mechanical skills. The process involves marking the old distributor's position, removing it, and carefully installing the new one to maintain correct engine timing. You will need basic hand tools and a timing light to set the timing correctly after installation.
Do I need a timing light?
Yes. While you can get the engine to start by carefully marking the old distributor's position, a timing light is required to set the ignition timing to the factory specification. Incorrect timing can cause poor performance, bad fuel economy, and even engine damage.
Are there any recalls for the distributor on this car?
No. Searches of the National Highway Traffic Safety Administration (NHTSA) database do not show any recalls specifically for the distributor on the 1980-1986 Chevrolet Impala.
Should I replace the cap, rotor, and wires at the same time?
Yes, this is highly recommended. Most new distributors come with a new cap and rotor. Replacing the spark plug wires at the same time ensures the entire ignition system is in top shape and can deliver a strong spark. Old wires can cause a weak spark and put a strain on the new distributor's coil.
Technical Specifications
System Type: High Energy Ignition (HEI), internal coil design. Trigger Style: Magnetic pickup. Advance Type: Mechanical and Vacuum.
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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.
- Chevrolet Impala:
- 🛍️ Shop This Part
- Signs of a Failing Distributor
- Heat is the Enemy
- Choosing the Right Aftermarket Distributor
- Tier 1: High-Performance Brands (MSD, Edelbrock, FAST)
- Tier 2: Quality Replacement & Mild Performance (Pertronix, Accel, some store brands)
- Tier 3: Budget-Friendly Brands (Cardone, WAI Global, unbranded)
- Pro Tip: Check the Gear
- Cost of a New Distributor for 1980-1986 Impala
- Frequently Asked Questions
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