Choosing the Right Spark Plugs for Your 1979-1988 Alfa Romeo Spider
Keep your classic Spider running smoothly with the correct set of new aftermarket spark plugs.
- Stick with trusted aftermarket brands like NGK and Bosch for reliable performance in your Spider.
- Standard copper-core spark plugs (like NGK BP6ES or Champion N9YC) are the best and most cost-effective choice for this engine.
- The correct spark plug gap is critical; it should be set to approximately 0.025 inches before installation.
- There are no recalls or TSBs for spark plugs on this vehicle, but be aware that oil fouling can be a symptom of other engine issues.
Symptoms of Failing Spark Plugs
Worn or fouled spark plugs can cause several noticeable problems in your Alfa Romeo Spider. Because these engines have specific running characteristics, identifying these symptoms early is important.
- Rough Idle: The engine may shake or sound uneven when the car is stopped.
- Engine Misfires: You might feel a hesitation or stumble from the engine during acceleration. This can feel like the car is running on three cylinders.
- Poor Acceleration: The car may feel sluggish or less responsive than usual.
- Difficulty Starting: A weak spark makes it harder for the engine to turn over, especially when cold.
- Reduced Fuel Economy: If you're filling up the tank more often, inefficient combustion from bad plugs could be the cause.
Known Issues
There are no active recalls or Technical Service Bulletins (TSBs) from the NHTSA related to spark plugs for the 1979-1988 Alfa Romeo Spider. However, these cars are known to sometimes consume oil, which can lead to spark plugs becoming fouled with carbon or oil deposits. If you find your plugs are consistently dirty, it may be a sign of other engine issues, such as worn valve seals or piston rings.
Choosing the Right Aftermarket Spark Plug
For a classic car like the 1979-1988 Spider, finding original "OEM" spark plugs from the 1980s (often Lodge or Champion) is not practical or necessary. Modern aftermarket brands are the standard for replacements and offer excellent, consistent quality. The main choice you'll make is the brand and the material of the electrode.
Brand Tiers for Your Spider
Top Tier (Highly Recommended): NGK, Bosch. These brands have a long history with European cars and are the most frequently recommended choice by enthusiasts for their reliability and performance in the Spider's engine.
Mid-Tier (Reliable): Denso, Champion. These are solid brands that offer good performance. Champion was an original equipment supplier for many European cars and their N9YC plug is a correct application. Denso is also a well-respected manufacturer.
Budget Tier (Functional): Autolite, Motorcraft, ACDelco. While functional, most Alfa enthusiasts prefer to use brands known for their specific compatibility with European engines.
Copper vs. Platinum/Iridium Plugs
The ignition system on your classic Spider was designed for standard copper-core spark plugs. These plugs are inexpensive and provide excellent performance. While modern platinum or iridium plugs last longer, they are not necessary for this vehicle and you will likely not see any performance gain. Many experts and owners agree that fresh, correctly gapped copper plugs provide the best and most cost-effective performance.
Pro Tip: Stick with Copper
For the 1979-1988 Spider, a standard copper spark plug like the NGK BP6ES or Champion N9YC is the best choice. They are affordable, work perfectly with the original ignition system 🎬 See a full refresh of the Spider's electrical and ignition components., and provide a strong, reliable spark. The money saved over expensive iridium plugs can be put toward changing them more frequently, ensuring your engine always runs its best.
Cost of Aftermarket Spark Plugs
| Item | Price Range |
|---|---|
| New Aftermarket Spark Plug (Single) | $2.99 - $16.38 |
| Shop Labor for Replacement | $75 - $150 |
Frequently Asked Questions (FAQ)
What is the correct spark plug gap for my Spider?
The most commonly recommended spark plug gap for the 1979-1988 Alfa Romeo Spider is approximately 0.025 inches. Some sources may list up to 0.031 inches. Always verify the gap with a feeler gauge and adjust if necessary before installation. Do not assume the plugs are correctly gapped out of the box.
How often should I replace the spark plugs?
For standard copper plugs in a classic car, a good interval is every 10,000 to 15,000 miles or every two years. Because they are inexpensive and easy to change, frequent replacement is good preventative maintenance that keeps your engine running at its best.
Is replacing spark plugs a good DIY job?
Yes, this is a very easy and rewarding job for a DIY mechanic, typically taking less than an hour. 🎬 Watch this step-by-step guide on installing plugs in an S3 Spider. You will need a ratchet, an extension, and a spark plug socket (often 21mm or 13/16"). The most important steps are to clean the area before removing the old plugs 🎬 Learn the best way to clean a grungy Alfa engine bay. and to not over-tighten the new ones in the aluminum cylinder head.
What's the difference between NGK BP6ES and B6ES plugs?
The 'P' in BP6ES stands for "Projected Insulator Tip." This means the center electrode and insulator project further into the combustion chamber. This is the standard, recommended type for most Alfa Spiders. The B6ES has a non-projected tip. While it may function, the BP6ES is generally the correct choice.
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Technical Specifications
Commonly Recommended Plugs: NGK BP6ES, Champion N9YC Thread Diameter: 14mm Hex Size: 21mm (13/16") Gap: ~0.025 inches Engine: 2.0L Twin Cam (Nord)
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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.