A Guide to Spark Plugs for the 1975-1989 Volvo 244
Keep your classic Volvo 244 running strong by choosing the right spark plugs for its legendary 'redblock' engine.
- Stick to OEM-equivalent brands like NGK or Bosch for best results; they are proven performers in the Volvo 'redblock' engine.
- Standard copper plugs (like NGK BPR6ES) are highly recommended over more expensive platinum or iridium plugs for this vehicle.
- Always check and set the spark plug gap to 0.028-0.032 inches before installation.
- Replacing spark plugs is a simple, inexpensive maintenance task that has a big impact on engine performance and reliability.
Signs of a Bad Spark Plug
The simple, robust engines in the 1975-1989 Volvo 244 are reliable, but they depend on a strong spark. When spark plugs wear out, you'll notice. Look for these common symptoms:
🎬 Watch this guide to diagnosing a rough running engine.- Rough Idle: The engine may shake or vibrate more than usual when you're stopped.
- Hesitation During Acceleration: The car might feel sluggish or stumble when you press the gas pedal.
- Reduced Fuel Economy: Worn plugs lead to incomplete fuel combustion, meaning you'll fill up more often.
- Difficulty Starting: A weak spark can make it harder for the engine to turn over, especially when cold.
- Engine Misfires: You may feel a jerking or sputtering sensation while driving as a cylinder fails to fire correctly.
Choosing the Right Aftermarket Spark Plugs
For the Volvo 244, the original spark plugs were often made by Bosch or NGK. This means high-quality aftermarket brands are not a downgrade; they are often the same as the original parts. The key is to stick with proven brands and the correct type of plug. These engines do not need expensive or fancy plugs to run well.
Aftermarket Brand Quality Tiers
| Tier | Brands | Quality Assessment |
|---|---|---|
| Top Tier (OEM Equivalent) | Bosch, NGK | Excellent choices, often the original equipment manufacturer. The simple copper core plugs like NGK BPR6ES or Bosch WR7DC are highly recommended by owners and mechanics for their reliability and performance in these engines. |
| Mid Tier | Denso, Champion | Solid, reliable brands that also perform well in the Volvo 244. They offer a good balance of quality and price. |
| Economy Tier | Autolite, Motorcraft | While functional, some owners have reported less consistent performance with these brands compared to the European or Japanese OEM equivalents. They can work but are not the first choice for most Volvo specialists. |
Pro Tip: Avoid a common mistake. Fancy multi-electrode or precious metal (iridium, platinum) plugs are not necessary for the B21, B23, and B230 engines. They offer no real performance benefit for this engine design and you are better off spending the money on fresh, standard copper plugs from a top-tier brand.
Known Issues & Recalls
There are no specific recalls or Technical Service Bulletins (TSBs) from NHTSA related to spark plugs for the 1975-1989 Volvo 244. The ignition system is straightforward and robust. The most common issues are owner-created, such as using the wrong plug type, incorrect gapping, or not tightening the plugs properly.
Frequently Asked Questions (FAQ)
How often should I change the spark plugs on my Volvo 244?
For standard copper plugs, which are recommended, a good interval is every 15,000 to 30,000 miles. Given their low cost, changing them more frequently is cheap insurance for a smooth-running engine.
What is the correct spark plug gap?
The recommended spark plug gap for most 1975-1989 Volvo 244 models is between 0.028 and 0.032 inches (0.7mm - 0.8mm). Always verify the gap with a gapping tool before installation, even if the box says they are "pre-gapped".
🎬 Watch a basic tune-up and spark plug replacement tutorial.Do I need special tools to change the spark plugs?
You will need a ratchet, an extension, and a spark plug socket (typically 13/16" for these cars). A spark plug socket has a rubber insert to protect the plug's porcelain insulator and hold it for easy removal. 🎬 See a full walkthrough of the spark plug replacement process. Applying a small amount of anti-seize to the new plug's threads is also a good practice.
Can I use platinum or iridium spark plugs?
You can, but it is generally not recommended or necessary. The ignition systems in these older Volvos were designed for standard copper plugs. Owners and mechanics widely agree that expensive plugs offer no benefit and that the money is better spent on more frequent changes of standard copper plugs from NGK or Bosch.
Helpful Videos
Technical Specifications
OEM Part Numbers: WR7DC BPR6ES 270746
Spark Plug Gap: 0.028" - 0.032" (0.7mm - 0.8mm) Socket Size: 13/16" or 21mm
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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.