Choosing the Right Alternator for Your 1971-1973 International 1110
Keep your classic International's electrical system reliable with the right new alternator.
- Any new alternator for this truck is an aftermarket part; quality varies by brand, so choose one with a good warranty.
- Symptoms include dim lights, a whining noise, a frequently dead battery, and the battery warning light on the dash.
- When replacing, inspect the main power wire and consider adding a fusible link for safety, especially on 1971 models.
- The job is DIY-friendly, but ensure the drive belt is in good condition and all mounting points are clean for a solid ground connection.
Is Your International 1110's Alternator Failing?
For a classic truck like the 1971-1973 International 1110, the electrical system is simple but vital. The alternator keeps everything running. When it starts to fail, it will give you some clear warning signs. Ignoring them can leave you stranded.
Common Symptoms of a Bad Alternator:
- Dimming or Flickering Headlights: You might notice your headlights get dimmer at idle and brighten up when you rev the engine. This is a classic sign of an alternator that can't keep up.
- Battery Warning Light: If your truck has a battery or 'ALT' light on the dashboard, it will light up if the system detects a charging problem.
- Weak or Dead Battery: A new battery that keeps dying is often not the battery's fault. The alternator is likely failing to recharge it as you drive.
- Whining or Grinding Noises: A high-pitched whine or a grinding sound from the front of the engine can point to bad bearings inside the alternator.
- Engine Stalling: Once the battery is drained, the alternator is all that's left. If it's failing, it won't provide enough power to keep the ignition system going, and the engine will stall.
Potential Wiring Issue on 1971 Models
Some early IH trucks from this era may not have included a fusible link in the main alternator wire. This wire runs from the alternator to the dash and back to the battery. If a short occurs, this wire can overheat and melt, creating a fire risk. When replacing your alternator, inspect this main power wire and consider adding an inline fusible link or fuse for safety if one is not present.
Choosing a New Aftermarket Alternator
For a 1971-1973 International, finding a "new old stock" (NOS) or original OEM part is nearly impossible. Every new alternator you buy today is an aftermarket part. The quality of these parts can vary, so it's important to understand the brands available.
| Brand | Reputation & Quality |
|---|---|
| Remy | A long-standing name in automotive electrics. Reviews are mixed; some users report years of good service, while others have experienced premature bearing failures. Remy's aftermarket division is reportedly owned by BBB Industries. It's a common choice, but quality can be inconsistent. |
| BBB Industries | A major remanufacturer that also produces new units. They supply many auto parts stores. Quality is generally considered acceptable for the price, but like any mass-market part, failures can occur. Some owners have had to re-orient, or "clock," the housing to fit their specific application. |
| MPA (Quality-Built) | Motorcar Parts of America is a large supplier that emphasizes its testing process. Their Quality-Built line aims to meet or exceed original specifications. They are a strong contender in the aftermarket space, focusing on providing a reliable new part. |
Pro Tip: Check Your Belt and Connections
Your new alternator can't do its job if the belt that spins it is worn out or if the electrical connections are dirty. Always inspect the drive belt for cracks and glazing. When installing the new alternator, clean the mounting points on the engine bracket to ensure a good ground connection. A poor ground is a common cause of charging problems.
How Much Does a New Alternator Cost?
The cost for a new alternator for your International 1110 will depend on the brand and where you buy it. Installation costs can also vary by shop.
| Part or Service | Estimated Cost |
|---|---|
| New Aftermarket Alternator | $40 - $116 |
| Shop Labor for Installation | $100 - $200 |
| Total Estimated Cost | $140 - $316 |
Frequently Asked Questions (FAQ)
Is replacing the alternator a DIY job?
Yes, for most owners with basic hand tools. The alternator on these trucks is usually easy to access. The process involves disconnecting the battery, loosening the belt tensioner, removing a few bolts and wires, and swapping the unit. It typically takes 1-2 hours.
Should I buy a new or remanufactured alternator?
This guide focuses on new aftermarket parts. New parts use all-new components and often come with a better warranty. Remanufactured units are a mix of old and new parts and can sometimes be less reliable, though high-quality remans exist. Given the price range, a new unit is often the preferred choice for peace of mind.
Can I upgrade to a higher-amperage alternator?
Yes, and it can be a good idea if you've added electrical accessories like modern lights, a powerful stereo, or an electric fan. The stock alternator might have been around 63 amps. Upgrading to a 100-amp unit (often based on the Delco 10si design) is a common and straightforward modification for these trucks, providing more power at idle and better overall performance.
Why did my alternator fail right after I installed it?
While part defects happen, early failure can also be caused by other issues. A very weak or bad battery can put a huge strain on a new alternator, causing it to overheat and fail. A loose or slipping belt, poor ground connection, or corroded battery cables can also cause charging problems that seem like a bad alternator. Always make sure the rest of your charging system is in good shape.
Technical Specifications
Most replacement alternators for this vehicle are based on the common Delco 10si style case. They are externally regulated or internally regulated, depending on the specific original setup and the replacement part. Amperage ratings typically range from a stock-like 63 amps to higher-output versions of 100 amps or more.
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.