Spark Plug Guide for the 1936 Pierce-Arrow Salon Twelve
Keep your V12 engine running smoothly with the correct new spark plugs.
- Your 1936 Salon Twelve requires twelve spark plugs.
- Use new Champion copper-core spark plugs that are equivalent to the original J6 type.
- Avoid modern platinum or iridium plugs, as they are not compatible with the stock ignition system.
- Set the spark plug gap to .025 inches before installation.
Choosing the Right Spark Plug for a Classic V12
For a vintage vehicle like the 1936 Pierce-Arrow Salon Twelve, selecting replacement parts is different than for a modern car. Original factory parts are no longer produced. Today’s new replacement parts are all made by aftermarket companies. The key is to choose a part that matches the specifications of the original ignition system.
Based on vintage service information and owner discussions, the correct type of spark plug for the 1936-1938 Pierce-Arrow V12 is a Champion J6 or its modern equivalent. It is critical to use a standard, copper-core spark plug. Modern platinum or iridium plugs are designed for high-energy electronic ignition systems and are not recommended for the Salon Twelve's original setup. Using these advanced plugs can lead to poor performance and rapid fouling because the stock ignition system doesn't provide enough voltage for them to work well.
Aftermarket Brand Quality: Champion
Champion is a historically correct brand for Pierce-Arrow vehicles and remains the recommended choice for new replacement plugs. New Champion copper-core plugs that cross-reference to the original J6 specification will provide reliable performance that is appropriate for the engine's design. They are designed to work well with the car's original ignition system and fuel delivery from the carburetor.
Spark Plug Cost for 1936 Pierce-Arrow Salon Twelve
| Part Type | Price Range (Set of 12) | Notes |
|---|---|---|
| New Aftermarket (Recommended) | $44.40 - $56.28 | Champion copper-core plugs are the standard replacement. Price is for a full set of twelve. |
| New Old Stock (NOS) | Varies Greatly | Original, unused plugs from the era. Can be very expensive and are typically sought by collectors for show cars, not regular drivers. Performance may not be better than a new plug. |
No Recalls or Technical Service Bulletins Found
No official recalls or Technical Service Bulletins (TSBs) from the manufacturer regarding spark plugs for the 1936 Pierce-Arrow Salon Twelve were found. This is normal for a vehicle from this era, as modern reporting systems like the NHTSA were not yet established.
Frequently Asked Questions
How many spark plugs does my 1936 Salon Twelve need?
Your vehicle's V12 engine requires a total of twelve spark plugs, one for each cylinder. It is always recommended to replace all twelve at the same time for balanced engine performance.
What should the spark plug gap be set to?
Vintage service information for the 1936-1938 Pierce-Arrow indicates a spark plug gap of .025 inches. Always verify this with a feeler gauge and adjust new plugs if necessary before installation.
Why are my new spark plugs turning black?
If new plugs become fouled with black soot shortly after installation, it is usually not the fault of the plug itself. This condition points to other issues, such as a rich fuel mixture from the carburetor, incorrect ignition timing, or potential oil consumption. The engine may require a tune-up or carburetor adjustment.
Can I use modern platinum or iridium spark plugs?
It is strongly advised to use standard copper-core plugs. Platinum and iridium plugs require a higher-energy spark than the original Pierce-Arrow ignition system can provide. Using them can result in a weak spark, incomplete combustion, and fouling, leading to worse performance, not better.
Technical Specifications
Recommended Plug: Champion J6 (or modern equivalent) Type: Copper Core, Non-Resistor Quantity Required: 12 Gap: .025 inches
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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.