A Guide to the Distributor Cap for the 1959-1960 International B112
Keep your classic International truck's ignition system reliable by understanding when and how to replace your distributor cap.
- For the 1959-1960 B112, new aftermarket distributor caps are the standard, reliable replacement option.
- Symptoms of a bad cap include misfires, rough idle, hard starting, and stalling.
- Always replace the distributor rotor at the same time as the cap for a complete ignition tune-up.
- The replacement is a simple, low-cost DIY job that can be completed in under 30 minutes.
Understanding the Distributor Cap in Your Classic International
For a straightforward, hardworking truck like the 1959-1960 International B112, the ignition system is simple but crucial. The distributor cap is at the heart of it, responsible for routing spark to each cylinder. Over time, the plastic can crack and the metal terminals inside can corrode or wear down from the constant high-voltage electricity passing through them. When this happens, your truck's performance will suffer. Recognizing the signs of a failing cap can prevent you from getting stranded.
Symptoms of a Failing Distributor Cap
A bad distributor cap can cause a variety of engine problems. You might notice one or more of these issues, which will likely get worse over time.
- Engine Misfires: The truck may buck, jerk, or stumble as you drive because a cylinder isn't firing correctly.
- Rough Idle: You may feel excessive vibration or shaking when the truck is running but not moving.
- Hard Starting: The engine may crank for a long time before it starts, or it might not start at all. This can be especially noticeable in damp weather.
- Stalling: The engine may suddenly shut off while you are driving or when idling at a stop.
Choosing the Right Aftermarket Cap
Finding a "new old stock" (NOS) International Harvester distributor cap is nearly impossible and would be very expensive. For a truck you plan to drive, a new aftermarket part is the most practical and reliable choice. Brands like Standard Ignition and Walker Products are well-known manufacturers of quality replacement ignition components.
When shopping, you may see options with different terminal materials:
- Aluminum Terminals: These are common and work fine for standard use, but they can corrode more quickly than brass.
- Brass Terminals: Brass is a better conductor and is more resistant to corrosion. Caps with brass contacts are generally considered a premium, longer-lasting option.
Distributor Cap Replacement Costs for 1959-1960 International B112
Replacing the distributor cap is an affordable and simple job. It's a common tune-up item that most owners can do themselves with basic hand tools.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Standard Ignition, Walker Products) | $24.44 - $34.65 |
| New OEM (NOS) | Not readily available |
| Shop Labor | $50 - $100 |
Frequently Asked Questions (FAQ)
How often should I replace the distributor cap on my B112?
For a vintage truck, it's best to inspect the cap and rotor during every major tune-up or annually. Look for cracks, carbon tracking (black lines), and corrosion or wear on the terminals. Replace it if you see any signs of damage or if you are experiencing ignition-related symptoms.
Is it hard to replace the distributor cap myself?
No, this is a very easy job for a DIY mechanic. It is typically held on by two clips or screws. You simply unclip the old cap, carefully move the spark plug wires to the new cap one by one to maintain the correct firing order, and secure the new cap. The entire process usually takes less than 30 minutes.
What happens if I put the spark plug wires on the wrong terminals?
If the spark plug wires are not in the correct firing order, the engine will not run. It may backfire or fail to start completely. It is critical to transfer the wires from the old cap to the new cap one at a time to avoid mixing them up.
Are there any recalls for the 1959-1960 International B112 distributor cap?
No. A search of the National Highway Traffic Safety Administration (NHTSA) database shows no recalls or technical service bulletins (TSBs) related to the distributor cap for this vehicle. This is expected for a vehicle of this age.
Technical Specifications
The distributor cap for the International B112 is typically a 6-terminal design for the inline-six engines common to this model. It features socket-style connections for the spark plug wires.
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.