How Many Spark Plugs In A V8 Engine?

Are you looking to upgrade the spark plugs in your V8 engine? Are you debating if more power is worth it, or if the cost of replacing all those pesky spark plugs will outweigh the benefits? If you’re wondering how many spark plugs in a V8 engine and what other alternatives may be available for better performance, then this blog post is for you! Read on to learn everything about replacing spark plugs in a V8 engine.

Answer: How Many Spark Plugs In A V8 Engine?

When it comes to V8 engines, eight spark plugs are the standard. Each cylinder gets its own spark plug, ensuring efficient combustion and maximum power output.

However, there are exceptions to this rule. Twin spark engines and newer HEMI engines have not one, but two spark plugs per cylinder. That means a whopping sixteen spark plugs in total!

How To Tell If My V8 Comes With A Twin Spark Engine?

Although consulting your owner’s manual is the easiest method, there’s an alternate way to visually identify whether your engine has dual ignition technology. If you take a glance at the cylinder head, you’ll notice a series of wires that are usually blue, red, or black.

Count the number of wires alongside each cylinder head to determine whether or not your V8 has a twin spark engine. If you find more than eight wires or coil packs, then you’ve got a sixteen spark plug engine, which means it’s equipped with dual ignition technology.

Related: Bad Spark Plug Symptoms

What Kinds Of Spark Plugs Are There?

There are several types of spark plugs available, each designed for specific purposes and engine requirements. Here are some of the common types:

Silver Spark Plugs

Silver spark plugs, although rare these days, used to be more common. They work well in older car models but might not be the best plug overall.

Copper Spark Plugs

Copper spark plugs are considered mid-range plugs with a low melting point. Many consumers find them to be a solid choice.

Platinum Spark Plugs

Platinum spark plugs are a popular choice due to their longevity and ability to reduce carbon build-up.

Iridium Spark Plugs

For those seeking the best option available, iridium spark plugs should be considered. They have the highest melting point among all options and also outlast platinum plugs.

How Many Spark Plugs In A V8 Engine (1)
How Many Spark Plugs In A V8 Engine (1)

Which Spark Plugs Are Best For My V8?

When it comes to choosing the right spark plugs for your V8 engine, there are several options available depending on the make and model of your vehicle and your budget.

Iridium spark plugs provide better performance at higher temperatures and longer than copper or platinum plug; however, they are more expensive.

Copper plugs are cheaper but wear out quicker due to their softer metal construction. Platinum spark plugs offer a good balance between cost and performance, but their life span is shorter than both copper and iridium varieties.

Related: How to fix a misfiring engine?

How Often Should You Change Spark Plugs in a V8?

It is recommended to change spark plugs every 80,000 and 100,000 miles, as this will ensure optimal performance in your V8 engine. However, this is an estimate and the actual mileage may vary depending on factors such as driving habits, climate, and spark plug type.

It is also important to check the condition of your spark plugs from time to time in order to identify any potential issues with the engine that could be causing misfires or poor fuel economy. If you notice anything out of the ordinary it’s best to get them replaced immediately.


When Should Spark Plugs Be Replaced In A V8 Engine?

Spark plugs in a V8 engine should generally be replaced based on the manufacturer’s recommended maintenance schedule. However, there are a few common signs that indicate it may be time to replace the spark plugs:

How Many Spark Plugs In A V8 Engine (2)
How Many Spark Plugs In A V8 Engine (2)

Engine Has A Rough Idle

If your V8 engine is producing a rough and shaky noise while idling, it might be time to take a look at your Spark Plugs. These little components are crucial for the proper functioning of your engine and a failure can cause other problems. The rough sound may be accompanied by noticeable vibrations through the car, including the steering wheel and pedals

Trouble Starting

It may not be the first thing that comes to mind when your car doesn’t start, but spark plugs play a crucial role in your car’s ignition system. Without those little sparks to ignite the fuel in your engine, your car won’t go anywhere. So, if you’re experiencing difficulty starting your car, it might be time to take a closer look at those spark plugs.

Engine Misfiring

When a spark plug gets old and worn out, it can cause the engine to misfire, which leads to jerky movements and a rough ride. If you sense that your vehicle is not performing like it used to, it could be time to inspect the spark plugs. This is especially true if you notice the check engine light illuminating or your car emitting an excessive amount of emissions.

Engine Surging

Engine surging is a clear indication that your engine is struggling to operate efficiently. The combustion process is disrupted, causing an irregular flow of air which can lead to a bumpy ride. Not only is it uncomfortable, but it can also be dangerous if not addressed promptly.

High Fuel Consumption

The Spark Plugs are responsible for igniting the fuel that powers your engine, and when they begin to fail, it can cause a reduction in your fuel efficiency. One of the most noticeable signs of worn Spark Plugs is a higher fuel consumption rate.

Lack Of Acceleration

This lack of acceleration could be a sign that it’s time to replace your spark plugs. Over time, spark plugs can become worn and fouled, leading to decreased performance and a less efficient engine. If you’ve noticed a decrease in acceleration or responsiveness, it’s worth considering a service that includes a change of spark plugs to get your engine firing on all cylinders again.

Related: How to Clean Ignition Coil?

FAQs about How Many Spark Plugs In A V8 Engine?

What V8 engines have 16 spark plugs?

The answer is all modern Chrysler Hemi engines. That’s right, these engines use not one, but two spark plugs per cylinder

Can a V8 have 6 spark plugs?

Unfortunately, that’s a no-go. V8 engines need at least one spark plug for each of their cylinders.

How many spark plugs does a V8 5.0 have?

A 5.0-liter V8 engine has 8 spark plugs, one for each cylinder.

Are all spark plugs the same?

No, there are different types of spark plugs available on the market. Silver, copper, platinum and iridium are some of the most popular choices.

How many spark plugs does a 5.7 L V8 have?

While some V8 engines only require eight spark plugs, the 5.7 L HEMI engine is a bit different. Most models of this engine actually have 16 spark plugs, which is twice the amount of a typical V8 engine.

This is because HEMI engines often use two spark plugs per cylinder instead of one, for a total of 16 spark plugs. The result is extra power and cleaner combustion, making the HEMI a popular choice among car enthusiasts.

How often should I change my spark plugs?

Spark plug maintenance is recommended every 30,000 to 50,000 miles or as recommended by your vehicle’s manufacturer.


Spark plugs are a crucial element in any engine, and understandinghow many spark plugs in a V8 engine is the key to keeping it running efficiently. V8 engines typically require 8 or 16 spark plugs, depending on the make and model of vehicle.

Neglecting your spark plugs can result in poor performance, higher fuel consumption and even engine misfiring. Regular maintenance of your spark plugs is essential to ensure that your car runs smoothly, so make sure to check up on them when it’s time.

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