Choosing Spark Plugs for a 1967-1970 Fargo A108 Van
Keep your classic Fargo's engine running strong with the correct new spark plugs.
- Confirm your engine size (e.g., 225 Slant-Six or 318 V8) before buying, as it determines the correct spark plugs.
- Standard copper plugs from Autolite or Champion are the best choice; expensive platinum or iridium plugs are not necessary for these engines.
- Always check and adjust the spark plug gap to your engine's specification before installation.
- Since the Fargo A108 is mechanically similar to the Dodge A108, searching for parts for the Dodge model will yield more results.
Signs of a Failing Spark Plug
Spark plugs are wear items, meaning they need to be replaced as part of regular maintenance. When they start to fail on your A108 Van, you'll notice some clear signs. A common symptom is a rough idle, where the engine feels shaky when you're stopped. You might also experience the engine misfiring or hesitating when you accelerate. Other signs include difficulty starting the engine, a decrease in fuel economy, and a general lack of power.
Choosing the Right Aftermarket Spark Plug
For a vehicle from this era, new original equipment (OEM) spark plugs are no longer available. The good news is that high-quality aftermarket plugs are easy to find and work perfectly in these engines.
Pro Tip: Fargo and Dodge Parts are Often Interchangeable
The 1967-1970 Fargo A108 Van is mechanically almost identical to the Dodge A108 Van. When searching for engine parts like spark plugs, you will have more success looking for parts listed for the Dodge A108 with the same engine as your Fargo.
The most important factor is matching the spark plug to your van's specific engine. The A108 was available with different engines, most commonly the 225 cubic inch "Slant-Six" and sometimes a 318 cubic inch V8. Always confirm your engine size before buying.
Brand Options: Autolite and Champion
For these classic engines, you don't need expensive, modern-style spark plugs. Standard copper core plugs are what the engine was designed for and what it runs best on. Both Autolite and Champion are period-correct brands that have been used in Chrysler products for decades.
- Autolite: Many owners and mechanics find Autolite plugs to be very reliable and a great value. They are a common replacement part for Slant-Six and other Chrysler engines of the era.
- Champion: Champion was often the original factory-installed brand for many Chrysler vehicles. While some mechanics have preferences, they are a perfectly suitable choice and will provide reliable performance.
Ultimately, both brands offer a quality, affordable spark plug that will work well in your Fargo A108. You can't go wrong with either choice, as long as you get the correct part number for your engine.
Always Check the Gap!
The most critical step of a spark plug change is setting the "gap" – the space between the two electrodes at the tip. This gap must be set to a precise specification for your engine to run properly. Do not assume the plugs are gapped correctly out of the box. A simple spark plug gapping tool is required for this job. The correct specification is often found on a sticker under the hood or in a service manual, but a common gap for these engines is 0.035 inches.
Cost of Aftermarket Spark Plugs (1967-1970 Fargo A108 Van)
| Part | Price Range (Per Plug) | Price Range (Set of 6) | Price Range (Set of 8) |
|---|---|---|---|
| New Aftermarket Spark Plug | $3.50 - $9.31 | $21.00 - $55.86 | $28.00 - $74.48 |
Frequently Asked Questions
How often should I replace the spark plugs on my Fargo A108?
For these older vehicles with standard copper spark plugs, a good replacement interval is every 10,000 to 15,000 miles or every two years to keep the engine running at its best.
Are more expensive iridium or platinum plugs better for my van?
No. These classic engines were designed for simple, standard copper spark plugs. Fancy, expensive plugs made of platinum or iridium offer no performance benefit and can sometimes cause running issues. Stick with the basics for the best results.
Do I need to use anti-seize on the spark plug threads?
Using a very small amount of anti-seize compound on the threads is a good practice. It helps prevent the steel spark plug from getting stuck (galling) in the cast iron cylinder head, making future removal much easier.
Are there any recalls for Fargo A108 spark plugs?
No, there are no recalls or technical service bulletins (TSBs) on file with the National Highway Traffic Safety Administration (NHTSA) related to spark plugs for the 1967-1970 Fargo A108 Van.
Technical Specifications
The most critical specification is the spark plug gap, which is typically 0.035 inches for these engines. However, you should always verify the correct gap for your specific engine using a service manual or the under-hood emissions sticker if it is still present.
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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.