Choosing the Right Alternator for Your 1981-1987 Dodge B350 Van
Keep your classic Dodge van's electrical system reliable by understanding its unique charging system and picking the best replacement part.
- You will likely need to swap the dual V-belt pulley from your old alternator onto the new one.
- A new aftermarket alternator from a brand like ACDelco, Remy, or MPA is a reliable and cost-effective choice for this van.
- While replacing the alternator, clean the metal mounting points to ensure a good ground connection, which is critical for proper function.
- If a new alternator doesn't solve a charging issue, the external voltage regulator or a fusible link are the next most likely culprits.
Is Your Dodge B350 Alternator Failing?
The charging system on these classic Dodge vans is relatively simple, but when the alternator starts to go, it gives clear warning signs. Because these vans rely on consistent voltage, even a small problem can cause noticeable issues.
- Dim or Flickering Headlights: One of the most common signs is headlights that dim at idle and brighten when you rev the engine. You might also notice the interior dome light or dashboard lights pulsing.
- Dead Battery: A good battery that repeatedly dies is a classic symptom of a bad alternator that isn't recharging it. Your van may start after a jump, but it will stall again once the battery is drained.
- Whining or Growling Noises: A high-pitched whine that changes with engine RPM often points to a bad diode, while a grinding or growling sound can mean the internal bearings are worn out.
- "ALT" or Battery Warning Light: An illuminated warning light on your dash is a direct indicator of a charging system problem.
- Slow Electrical Accessories: If your power windows are slow, or the radio cuts out, it can mean the alternator isn't providing enough power to run everything.
Choosing the Right Aftermarket Alternator
For a vehicle from this era, finding a new OEM (Original Equipment Manufacturer) alternator is nearly impossible. Aftermarket parts are the go-to solution, offering a great balance of performance and value. A new aftermarket unit is often a more reliable choice than a remanufactured one from a local parts store, as it contains all-new components and avoids the risk of underlying old parts failing.
Crucial Fitment Check: The Pulley
A very common issue when replacing the alternator on a 1981-1987 B350 is the pulley. Your van uses a dual V-belt system, but many new alternators are sold with a pulley for a modern serpentine belt. You will likely need to swap the V-belt pulley from your old alternator onto the new one. This usually requires an impact wrench to remove the nut holding the pulley on the shaft. Always compare the new part to the old one before you begin installation.
Aftermarket Brand Tiers for Your B350
The brands available offer good, reliable options for keeping your van on the road.
- Standard Replacement (ACDelco, BBB Industries, MPA, Remy): These brands are the workhorses of the aftermarket. They produce quality new alternators that meet or exceed original factory specifications. For a stock B350 used for daily driving or light-duty work, a new alternator from any of these brands is a solid and dependable choice.
- High-Output / Performance (Powermaster): If your van has heavy electrical demands—like a camper conversion, a powerful stereo system, or extra lighting—upgrading to a high-output alternator from a brand like Powermaster is a smart move. These are built to provide more amperage at idle and keep up with the extra load.
Known Issues, Recalls, and Service Bulletins
Searches for official recalls or Technical Service Bulletins (TSBs) from Dodge or the NHTSA specifically for alternator failure on the 1981-1987 B350 did not yield any results. Charging system problems on these vans are typically related to the age of the components. Forum discussions among owners point to potential failure points not just in the alternator, but also in the external voltage regulator and the fusible links in the wiring between the alternator and battery. When troubleshooting, it's wise to check these related parts as well.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $84.51 - $152.39 |
| Remanufactured Aftermarket | $75 - $140 |
| Shop Labor | $120 - $200 |
Frequently Asked Questions (FAQ)
How can I test my alternator at home?
With the engine running, use a multimeter to check the voltage across your battery terminals. A healthy charging system should read between 13.7 and 14.5 volts. If the reading is closer to 12 volts or dropping, the alternator is likely not charging. You can also get the alternator tested for free at most auto parts stores.
Is replacing the alternator a difficult DIY job?
For someone with basic mechanical skills, this is a very manageable job that takes about 1-2 hours. The main steps are disconnecting the battery, removing the drive belts, unbolting the alternator, and swapping the electrical connections. The most challenging part may be swapping the pulley if required.
Do I need a higher amperage alternator?
For a stock van, the standard output is sufficient. However, if you've added significant electrical accessories like a large sound system, extra lights, or RV power inverters, a high-output alternator (100+ amps) is recommended to handle the increased load without draining the battery.
What is an external voltage regulator and should I replace it too?
On these vans, the voltage regulator is a separate part (often mounted on the firewall) that controls the alternator's output. While you don't always have to replace it with the alternator, it can be a source of charging problems. If a new alternator doesn't fix your issue, the regulator is the next logical part to inspect and replace.
Technical Specifications
System uses an externally mounted voltage regulator. Most models are equipped with a dual V-belt pulley system, not a serpentine belt. Amperage ratings vary, with standard outputs typically between 60 and 90 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.
- Dodge B350: