Ignition Coil Guide for 1955-1956 Studebaker E38 Trucks
Solve common starting and running problems by understanding your Studebaker E38's ignition coil.
- You MUST confirm if your truck is a 6-volt (1955) or 12-volt (1956) system before ordering a coil.
- A failing coil causes obvious problems like misfiring, hard starting, or stalling.
- Replacement is a very easy DIY job that takes less than 30 minutes with basic tools.
- For best results, replace the ignition points and condenser at the same time as the coil.
Is Your Studebaker 6-Volt or 12-Volt? This is Critical.
Before you buy an ignition coil, you MUST know your truck's electrical system voltage. This is the most common and costly ordering mistake. Installing the wrong coil can cause it to fail quickly and may damage other parts of your ignition system, like the points and condenser.
- 1955 Models: Typically use a 6-volt electrical system. You must use a 6-volt ignition coil.
- 1956 Models: Typically use a 12-volt electrical system. You must use a 12-volt ignition coil.
Pro Tip: Many classic trucks have been converted from 6V to 12V over the years. The easiest way to check is to look at your battery. A 6-volt battery has 3 filler caps on top, while a 12-volt battery has 6 caps. Always verify what is in your truck today.
Symptoms of a Failing Ignition Coil
A failing ignition coil on your Studebaker E38 will cause noticeable engine problems. Since these trucks don't have check engine lights, you need to watch for these signs:
- Hard Starting or No Start: The engine cranks over but struggles to fire up, or won't start at all. This happens when the coil can't produce a strong enough spark.
- Engine Misfires: The engine sputters, shakes, or hesitates, especially when you accelerate. This feels like the engine is losing power intermittently.
- Rough Idle: The truck vibrates or runs unevenly when it's stopped and idling.
- Stalling: The engine may suddenly die when you come to a stop or even while driving.
- Backfiring: A loud pop from the exhaust can occur if unburned fuel enters the exhaust system because of a weak or inconsistent spark.
Choosing the Right Aftermarket Ignition Coil
Original factory coils for your Studebaker are no longer produced. While you might find a "New Old Stock" (NOS) part, a modern aftermarket coil is the most reliable and practical choice. For a vintage truck like the E38, the quality of major aftermarket brands is generally very good and they are designed to work with the original points-style ignition system.
- Standard Ignition (SMP): A well-known brand that has been making quality ignition components for decades. They are a trusted choice for classic vehicles and their parts are built to meet or exceed original specifications.
- NGK: While famous for spark plugs, NGK also produces high-quality ignition coils. They are widely considered a top-tier brand for ignition components by many mechanics.
- Spectra: Spectra offers a range of ignition parts that are generally seen as a reliable standard replacement option.
A Note on Ballast Resistors: Some ignition systems on these trucks use an external ballast resistor. This is a small ceramic block that reduces voltage to the coil while the engine is running. Coils are marked either "For use with external resistor" or "No external resistor required." Be sure to buy the correct type for your specific setup to avoid damaging the coil or ignition points.
Estimated Cost of Ignition Coil Replacement
| Part Type | Part Cost | Shop Labor Cost | Total Estimated Cost |
|---|---|---|---|
| New Aftermarket Coil | $28.62 - $51.38 | $50 - $100 | $78.62 - $151.38 |
| New Old Stock (OEM) | Varies (Rare) | $50 - $100 | Varies Widely |
Frequently Asked Questions (FAQ)
Is replacing the ignition coil a DIY job?
Yes, absolutely. Replacing the coil on an E38 is very simple. It's typically held by a single bracket and has only a few wires to connect. The entire job can be done in under 30 minutes with basic hand tools.
Should I replace the points and condenser at the same time?
Yes, it is highly recommended. The coil, points, and condenser are all part of the same system and wear out over time. Replacing them all at once is a key part of a regular tune-up for these trucks and ensures the entire ignition system is reliable.
Are there any recalls for the ignition coil on my Studebaker truck?
No. There are no recalls from the NHTSA for the ignition system on 1955-1956 Studebaker trucks. Recalls for vehicles of this age are extremely rare.
What is the most common mistake when ordering an ignition coil for my E38?
The most common mistake is ordering a coil with the wrong voltage. You must confirm if your truck has a 6-volt (likely 1955) or 12-volt (likely 1956) system before purchasing a new coil.
Technical Specifications
System Voltage: 6V (1955 models) or 12V (1956 models). Ignition Type: Single coil with distributor and points. May require an external ballast resistor depending on the specific setup.
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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.