Choosing the Right Aftermarket Alternator for Your 1968 International 1100C
Keep your classic International truck's electrical system reliable with the right new alternator.
- Symptoms of a bad alternator include dim/flickering lights, a frequently dead battery, and whining noises from the engine.
- New aftermarket alternators are the most practical and reliable option for a 1968 International 1100C.
- Replacing the alternator is a straightforward DIY job that can be done in 1-2 hours with basic tools.
- Consider upgrading to a higher-amperage, one-wire alternator if you have added modern electrical accessories.
Is Your 1100C's Alternator Failing?
On a classic truck like the 1968 International 1100C, alternator problems can be mistaken for battery issues. If you find yourself needing to jump-start the truck often, the alternator is a likely suspect. If you jump-start the engine and it dies soon after, the alternator isn't doing its job of recharging the battery.
Other common signs include:
- Dim or Flickering Lights: Headlights and dash lights that are dim, pulsing, or unusually bright point to inconsistent voltage from a failing alternator.
- Whining or Grinding Noises: A high-pitched whine or a grinding sound from under the hood can mean the bearings inside the alternator are worn out. A squealing noise could also point to a loose or worn alternator belt.
- 'AMP' or 'GEN' Light: If your truck has a generator or ammeter light on the dash, it may glow or flicker if the alternator's output is low.
OEM vs. Aftermarket Alternators
Finding a "New Old Stock" (NOS) or original equipment (OEM) alternator from 1968 is highly unlikely and not practical. The market for your 1100C is dominated by new and remanufactured aftermarket parts. Today's aftermarket alternators are built to modern standards and often exceed the performance of the original 1968 parts. For a vintage truck, a quality new aftermarket unit is the most reliable and sensible choice.
Aftermarket Brand Quality Tiers
| Tier | Brands | Our Take |
|---|---|---|
| Better | Remy, WAI Global | Remy has a long history, originally tied to GM's Delco-Remy division, and is a well-known name in aftermarket electrical parts. WAI Global is another large supplier, known for testing its new units before they ship. Both are solid choices, though some users report occasional quality control issues, which is common for any mass-produced part. |
| Good | BBB Industries, MPA (Quality-Built) | BBB Industries is a major remanufacturer and also produces new parts, supplying many large auto parts stores. MPA, or Motorcar Parts of America, owns the Quality-Built brand and is a large North American supplier with a focus on strict testing. These brands offer a good balance of price and performance for a vehicle like the 1100C. |
Pro Tip: Consider a One-Wire Alternator Upgrade
For owners who have added modern accessories like electric fans, powerful stereos, or extra lighting, upgrading to a higher-amperage, one-wire alternator is a popular choice. These units simplify wiring and provide more power at idle. Some are available with outputs over 100 amps, a significant increase from the stock unit.
New Aftermarket Alternator Cost for 1968 International 1100C
| Part Type | Price Range |
|---|---|
| New Aftermarket Alternator | $40.18 - $162.95 |
(Pricing is based on a range of available new aftermarket alternators for this vehicle and is subject to change.)
Frequently Asked Questions
Can I replace the alternator on my 1100C myself?
Yes, this is a very DIY-friendly job for a beginner to intermediate mechanic. Access is generally good on these older trucks. The process involves disconnecting the battery, loosening the belt tensioner, removing the old V-belt, unbolting the alternator, and reversing the process for installation. It typically takes 1-2 hours.
How do I know if it's the alternator or the external voltage regulator?
If your battery is being overcharged (reading above 15 volts when running, causing boiled-over battery acid) or not charged at all, the external regulator can be the culprit. Many owners choose to replace both at the same time, or upgrade to a modern alternator with an internal regulator to eliminate this extra point of failure.
Do I need a specific amperage?
For a stock truck with no added electronics, a standard replacement alternator will be sufficient. If you have added or plan to add accessories like electric fans, a high-power stereo, or off-road lights, you should consider a higher-amperage alternator to handle the extra load. Some aftermarket units for these trucks offer over 100 amps.
What is a "one-wire" alternator?
A one-wire alternator is a popular upgrade that simplifies wiring. It has an internal voltage regulator and only requires a single wire connected to the battery to function. This is a clean and reliable option, especially for modified or restored trucks.
Technical Specifications
Uses a V-belt pulley system. Most original units were externally regulated. Amperage ratings vary, but stock units were typically in the 35-55 amp range. Upgraded one-wire units can exceed 100 amps.
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.