Spark Plug Guide for the 1985-1989 Maserati Ghibli: A Note on Model Years
Understanding the production history of the Ghibli is the first step to finding the right parts for your classic Maserati.
- Verify your vehicle is not a 1985-1989 Ghibli, as this model was not in production; it is likely a Biturbo or a Ghibli from another generation.
- Stick to OEM-quality spark plug brands like NGK or Bosch that match the original specifications for your vehicle's model year.
- Do not assume modern iridium or platinum plugs are an upgrade; the original copper or nickel plugs are often best for the ignition systems of this era.
- Always check and adjust the spark plug gap before installation on a classic turbocharged engine.
A Note on Vehicle-Specific Information
Owners looking for parts for a 1985-1989 Maserati Ghibli should be aware that Maserati did not produce a model under the Ghibli name during these years. The original Ghibli (AM115) was manufactured from 1967 to 1973. The name was later revived for the Ghibli II (AM336) from 1992 to 1998, and again for the Ghibli III (M157) starting in 2013.
It is possible that your vehicle is a different model from that era, such as the Maserati Biturbo, which was in production from 1981 to 1994. Maserati produced several models based on the Biturbo platform between 1985 and 1989, including the 420, 425, and Spyder. Please verify your vehicle's model and year to ensure you are purchasing the correct parts.
Verify Your Model
Before purchasing spark plugs, double-check your vehicle's model and production year. Parts intended for a Ghibli I, Ghibli II, or the contemporary Biturbo are not interchangeable and will not fit a model from a different generation.
Choosing Aftermarket Spark Plugs for a Classic Maserati
For classic Maseratis of the 1980s, like the Biturbo, finding specific high-performance aftermarket brands can be challenging. Most available parts will be from reputable OEM-equivalent manufacturers. Given the age and specific engineering of these vehicles, sticking to OEM-quality brands like NGK or Bosch is a reliable choice. While modern iridium or platinum plugs are available, the ignition systems on these older vehicles were designed for standard copper or nickel plugs. Using a plug type that differs significantly from the original design may not provide any benefit and could potentially cause running issues.
Pro Tip
When replacing spark plugs on an older, turbocharged engine like those found in the Biturbo family, it is crucial to check the plug gap before installation. Do not assume the pre-set gap is correct for your specific application. A forum for a 1988 Biturbo noted persistent engine trouble even after replacing multiple ignition components, highlighting the sensitivity of these systems.
Frequently Asked Questions
Why can't I find parts for a 1987 Maserati Ghibli?
The Maserati Ghibli was not in production in 1987. The first generation ended in 1973 and the second began in 1992. You may have a different Maserati model from that period, such as the Biturbo.
Are there any recalls for Maserati spark plugs from this era?
Searches for recalls related to spark plugs on 1985-1989 Maserati models, including the Ghibli and Biturbo, did not yield any specific results. Recalls found for the Ghibli nameplate pertain to much newer models (2014 and later) and typically involve issues like fuel lines or software, not spark plugs.
What spark plug brands are recommended for a 1980s Maserati?
For Maserati models of the 1980s, such as the Biturbo, it is best to use OEM-quality brands. NGK and Bosch are commonly cited as reliable options for these vehicles. It is more important to match the original material (typically copper or nickel) and heat range than to upgrade to modern iridium plugs, which may not be compatible with the vehicle's ignition system.
What are the signs of bad spark plugs on a classic Maserati?
Symptoms of failing spark plugs are consistent across most gasoline engines. They include difficulty starting, a rough or uneven idle, engine misfires, poor acceleration, and reduced fuel economy. On a turbocharged engine from this era, these symptoms can be more pronounced.
Technical Specifications
Due to the model year discrepancy, no specific OEM part numbers can be provided. For the contemporary Maserati Biturbo, spark plugs were typically copper or nickel with a thread reach of around 19mm. Always confirm the correct specifications for your exact model and engine.
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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