Choosing the Right Spark Plugs for Your 1987-1989 Dodge Raider
Your Raider has one of two different engines, so picking the correct spark plug is the first step to a healthy ignition system.
- You must confirm if you have the 2.6L 4-cylinder or 3.0L V6 engine, as they use different plugs.
- For best results and OEM-level reliability, choose spark plugs from NGK or Denso.
- Standard copper plugs are affordable but need changing more often (every 15-30k miles); Iridium/Platinum plugs cost more but last much longer.
- Always check the spark plug gap before installation, even if the box says they are pre-gapped.
Symptoms of Failing Spark Plugs in a Dodge Raider
When your spark plugs are wearing out, your truck will give you several signs. Because these symptoms can also point to other ignition problems, it's a good idea to inspect your plugs first. They are inexpensive and easy to change.
- Rough Idle: The engine may shake or vibrate more than usual when you're stopped.
- Engine Misfires: You might feel a hesitation or stumble from the engine while driving. This happens when a cylinder fails to fire correctly.
- Poor Fuel Economy: If you notice you're filling up the gas tank more often, worn plugs could be the cause. An incomplete burn wastes fuel.
- Difficulty Starting: A weak spark makes it harder for the engine to turn over, especially when cold.
- Reduced Power: Your Raider may feel sluggish and slow to accelerate.
Choosing the Right Aftermarket Spark Plug
Your 1987-1989 Dodge Raider was built with one of two engines: the 2.6L 4-cylinder or the 3.0L V6 (available in 1989). These engines require different spark plugs. Always confirm your engine size before buying.
Brand Tiers for Your Raider
Since your Dodge Raider is a rebadged Mitsubishi Pajero, using parts from Japanese manufacturers is often a reliable choice.
- Tier 1: OEM-Equivalent (NGK, Denso)
For any Japanese vehicle, NGK and Denso are the gold standard. Many owners of Mitsubishi engines report the best performance and reliability with these brands. They were often the original equipment manufacturer. If you want a plug you can install with confidence, choose one of these brands. - Tier 2: Standard Aftermarket (Champion, Autolite, Bosch)
These are well-known American and German brands that produce reliable spark plugs. Champion was a very common brand for American vehicles of this era. While they are a perfectly good option for your Raider, most enthusiasts of Mitsubishi-built engines prefer to stick with NGK or Denso.
Spark Plug Materials: Copper vs. Platinum/Iridium
You will see plugs made of different materials at different price points. The main difference is longevity.
- Copper/Nickel Plugs: These are the most basic and affordable type of spark plug. They offer excellent performance but have the shortest lifespan. For the 6G72 V6 engine, owners recommend changing copper plugs as often as every 15,000 miles. They are a great choice if you don't mind changing them more frequently or are on a tight budget.
- Iridium & Platinum Plugs: These plugs have a fine tip made from a precious metal, which lasts much longer than copper. They maintain a strong spark for tens of thousands of miles, meaning you won't have to change them as often. For the slightly higher initial cost, you get a much longer service interval.
Aftermarket Spark Plug Cost (1987-1989 Dodge Raider)
| Tier | Type | Price Range (per plug) |
|---|---|---|
| Standard (Copper/Nickel) | Autolite, Champion | $3.23 - $5.00 |
| OEM-Equivalent (Copper/Nickel) | NGK, Denso | $3.98 - $9.00 |
| Long-Life (Iridium/Platinum) | NGK, Denso, Bosch | $8.97 - $16.79 |
Known Issues, Recalls, or TSBs
Searches for recalls or technical service bulletins (TSBs) from the NHTSA related to spark plugs for the 1987-1989 Dodge Raider did not produce any results. While some owners in forums report general engine reliability issues, there are no widespread, documented problems specifically caused by faulty spark plugs for this vehicle.
Frequently Asked Questions (FAQ)
Do I need different plugs for the 2.6L and 3.0L engines?
Yes, absolutely. The 2.6L 4-cylinder and 3.0L V6 are completely different engines and require different spark plugs. Using the wrong plug can cause poor performance or even engine damage. Always verify your engine size before purchasing.
What is the correct spark plug gap?
The spark plug gap is the small space between the center and ground electrodes. For the 3.0L V6, a gap of 0.044 inches is often specified. However, the best practice is to always check the emissions label under the hood of your specific vehicle for the correct gap. While many modern plugs come pre-gapped, it is essential to check and adjust them if needed with a feeler gauge or gapping tool.
How often should I change the spark plugs on my Raider?
This depends on the type of plug you use. For standard copper plugs, a good interval is every 15,000 to 30,000 miles. If you install more expensive iridium or platinum plugs, you can typically go much longer, often 60,000 miles or more.
Is it difficult to change the spark plugs myself?
No, this is a great DIY job for beginners. The spark plugs on both the 2.6L and 3.0L engines are generally easy to access. You will need a ratchet, a spark plug socket, and an extension. The most important rule is to change one plug and wire at a time to avoid mixing up the engine's firing order.
Technical Specifications
Engine Fitment: 1987-1989 2.6L 4-Cylinder (Mitsubishi 4G54) OR 1989 3.0L V6 (Mitsubishi 6G72). Spark Plug Gap (3.0L V6): ~0.044 in (1.1mm). Spark Plug Gap (2.6L I4): ~0.028 in (0.7mm). NOTE: Always confirm the correct gap by checking the vehicle information sticker under the hood.
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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.
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- Symptoms of Failing Spark Plugs in a Dodge Raider
- Choosing the Right Aftermarket Spark Plug
- Brand Tiers for Your Raider
- Spark Plug Materials: Copper vs. Platinum/Iridium
- Aftermarket Spark Plug Cost (1987-1989 Dodge Raider)
- Known Issues, Recalls, or TSBs
- Frequently Asked Questions (FAQ)
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