A Guide to the Distributor Cap for the 1963-1972 Volkswagen Transporter
Keep your classic air-cooled Bus running strong by choosing the right distributor cap for its ignition system.
- Inspect the distributor cap for cracks and carbon tracks at every tune-up.
- Always replace the rotor at the same time as the cap for best results.
- Identify your distributor type (stock vacuum advance vs. 009) before ordering to ensure a correct fit.
- For reliability, choose a quality German brand like Bremi or use a Pertronix cap if you have a Pertronix distributor.
Is Your Distributor Cap Failing?
A distributor cap is a simple part, but when it wears out, it can cause noticeable problems with how your Transporter runs. The signs are often straightforward and related to an inconsistent or weak spark. Look for these common symptoms:
- Engine Misfires: The engine may stutter, shake, or hesitate while you're driving or idling. This is often one of the first signs.
- Trouble Starting: A cracked or worn-out cap can make it difficult to start the engine, especially in damp weather when moisture can get inside the cap and disrupt the spark.
- Rough Idle: If your Bus is shaking or running unevenly when stopped at a light, a faulty cap could be the cause.
- Visible Damage: When you inspect the cap, you might see cracks in the plastic, white or greenish corrosion on the metal terminals, or black lines (carbon tracks) on the inside. The small, spring-loaded carbon pin in the center should also be present and intact.
Known Issues for This Vehicle
No recalls or Technical Service Bulletins (TSBs) exist for the distributor cap on the 1963-1972 Transporter; these are not issued for vehicles of this age. The main "issue" is the variable quality of aftermarket parts. The classic VW community strongly prefers German-made brands like Bosch or Bremi for reliability. Using a low-quality, unbranded cap can lead to premature failure and leave you stranded.
Choosing the Right Aftermarket Distributor Cap
For a classic vehicle like the Type 2, "OEM" often means finding New Old Stock (NOS) Bosch parts, which can be difficult and expensive. Aftermarket parts are readily available and offer a good balance of quality and price. Here’s how the available brands generally stack up for your Bus.
Brand Quality Tiers
OEM-Equivalent (Better):
- Bremi: As a German manufacturer, Bremi has a reputation for producing high-quality ignition components that are considered equivalent to original equipment. For owners looking for reliability and a proper fit without hunting for a vintage Bosch part, Bremi is an excellent choice.
Performance Upgrade (Best):
- Pertronix: Pertronix is famous for its electronic ignition conversion kits (like the Ignitor and Flame-Thrower distributors). Their distributor caps are designed to work perfectly with these systems. If you have upgraded to a Pertronix distributor, you should use a Pertronix cap to ensure a perfect fit and optimal performance. They are made from high-dielectric strength compounds to prevent crossfire.
Standard Replacement (Good):
- Standard Ignition (SMP) & Walker Products: These are reputable aftermarket brands that produce reliable replacement parts that meet or exceed original specifications. While they may not have the same European heritage as Bremi, they are a solid, budget-friendly choice for a daily driver or a stock engine tune-up.
Common Ordering Mistake: Know Your Distributor!
Not all distributors are the same. Over the years, your Transporter may have had its original distributor swapped for a different model, like the popular Bosch 009 centrifugal advance distributor. This model requires a different cap than the stock vacuum-advance distributors. Always inspect your current distributor and cap to ensure you order the correct replacement. They look different and are not interchangeable.
Cost of a New Aftermarket Distributor Cap
| Item | Estimated Cost |
|---|---|
| New Aftermarket Distributor Cap | $11 - $38 |
| Distributor Cap & Rotor Kit | $15 - $50 |
Note: Prices are estimates and can vary based on brand and supplier. It is highly recommended to replace the rotor along with the cap.
Frequently Asked Questions
How often should I replace my distributor cap?
A distributor cap is a maintenance item. It's good practice to inspect it during every tune-up and plan to replace it and the rotor every 30,000 miles or so, 🎬 See how a cap replacement fits into a full tune-up. depending on conditions. Given the low cost of the part, replacing it proactively can prevent future headaches.
What are the black specks or lines inside my old cap?
Those black marks are called carbon tracks. They are created by electricity finding a shorter path to ground along the inside surface of the cap, often due to moisture or cracks. This diverts energy from the spark plugs and is a clear sign the cap needs to be replaced immediately.
Do I need a special cap for my Pertronix electronic ignition?
Yes, it is highly recommended. If you have a complete Pertronix distributor, you should use a Pertronix-specific cap. These are designed for a perfect fit and often feature male (HEI style) posts instead of the traditional female sockets, so you may need new spark plug wires as well.
Is it hard to replace a distributor cap?
No, this is one of the easiest jobs you can do on an air-cooled VW. It is held on by two spring clips. 🎬 Watch this quick walkthrough on replacing your cap and rotor. The most important step is to transfer the spark plug wires from the old cap to the new cap one at a time to ensure the firing order remains correct.
🎬 Follow this guide to ensure your ignition wires stay in order.Helpful Videos
Technical Specifications
OEM Part Numbers: 113905207C
Varies by distributor type (e.g., Bosch 009 style vs. stock vacuum advance style). Caps can have female (socket) or male (HEI) terminals. Material is typically high-dielectric plastic or Bakelite.
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.