How Many Spark Plugs In A V8? (V8 Engines Ultimate Guide) | Flawless Car Guide

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How many spark plugs in a v8

When it comes to maintaining a V8 engine, one of the most common questions that car enthusiasts ask is, “How many spark plugs does a v8 have?”

Although it appears to be a simple question, the answer varies with the make and number of cylinders in the vehicle’s engine.  

Some V8 engines have eight while others have sixteen spark plugs per cylinder.  

In this article, we will explore the topic of how many spark plugs in a v8 as well as the advantages of using more spark plugs. Read on to learn more about this crucial aspect of V8 engine performance.

Let’s get right into it:

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How many spark plugs in a v8

How Many Spark Plugs In A V8 Engine?

The number of spark plugs in a V8 engine will vary depending on the engine’s configuration. A typical V8 engine will have eight spark plugs per cylinder, one for each.

It’s possible, though, that some engines have 16 spark plugs total—two spark plugs per cylinder. 

This is the case with V8 HEMI engines that use a multiple-displacement system or two-spark plugs V8 engines that lack a distributor.

In order to implement dual ignition technology, two spark plugs per cylinder are used.

As a result, horsepower is increased while emissions are decreased. That’s because each cylinder has its own set of ignition coils or a spark plug wire. 

Consequently, the number of V8 engine spark plugs can differ based on the engine and its specific technology, regardless of whether you drive a:

  • Toyota
  • Mercedes
  • BMW
  • Range Rover
  • Lexus
  • Dodge Charger
  • Chrysler
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How many spark plugs in a v8

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

Whether or not your V8s are equipped with two-spark plugs engines can be determined in a few different ways. The easiest way to find Spark plug count in V8 is to consult the manual that came with it.  

However, if you insist on doing it by hand, here is how to find Spark Plugs step by step:

Step-1) Remove the Cover:

First make sure the engine is cool enough to touch, and then remove the engine cover.  

Step-2) Count the Spark Plug Wires:

Then, for each cylinder head, count the number of wires.

Typically, these cables are

  • Blue
  • Black
  • Red

If you look under the hood of your car and don’t see any wires, you have ignition coils-pack ignition. These parts sit above the crankshaft on your engine. 

Then, count the spark plug wires alongside each cylinder head.

Eight wires indicate that your vehicle’s engine uses the standard eight spark plugs found in V8 engines.

In contrast, if your vehicle has 16 wires, it has a two spark plugs engine. 

If you want to learn more about your car’s engine, it’s important to consult the manual that came with it.

How many spark plugs in a v8

How Are Spark Plugs Used in V8s?

V8 engine power and spark plug efficiency complement each other positively. The spark plugs in a V8 ignition system components are extremely important to the engine’s operation.

Their primary function is to produce an electric discharge that burns up the air-fuel mixture inside the internal combustion engines. 

The resulting explosion pushes the piston down, which in turn rotates the crankshaft and powers the transmission. 

The eight V8 engine spark plugs are distributed evenly between the right and left banks in the following pairwise configuration: 

  • 1, 8
  • 4, 3
  • 6, 5
  • 7, 2 

Amazingly, spark plugs can ignite as many as 400 times per second per cylinder, resulting in a staggering amount of force. 

The high-energy explosions produced by this level of ignition provide the power that distinguishes V8 engines.

So the next time you turn the key in your V8, think about the V8 engine performance and spark plugs’ importance for your car’s performance.

Why Is It That Some V8s Have 16 Spark Plugs?

Twin-spark plug engines are internal combustion engines with a set of two spark plugs per cylinder. Some engines use dual ignition technology, which necessitates a 16-spark plug count in V8. 

Because more electric sparks are produced, thanks to this technology, the air-fuel mixture burns:

  • More Quickly
  • Completely 

These two spark plugs allow for the addition of more horsepower while simultaneously decreasing emissions. This is due to the fact that cleaner combustion occurs, leaving fewer unburned hydrocarbons that contribute to pollution. 

For these reasons, as well as the ability to meet more stringent emissions standards, twin-spark V8 engines have gained popularity in recent years.

Common Engines With Single And Twin Spark Engines:

spark plugs in a V8 engine

The following are the cars with Eight Spark plugs engines:

  1. Chevrolet Camaro SS 
  2. Ford Mustang GT 
  3. BMW M3
  4. Chevrolet Corvette
  5. Range Rover Sport
  6. Bentley Continental GT 

The following are the cars with twin spark engines:

  1. Jeep Grand Cherokee 
  2. Dodge Charger R/T
  3. Mercedes CL55 AMG 
  4. Dodge Ram 1500 HEMI
  5. Chrysler 300C
  6. Dodge Challenger
spark plugs in a V8 engine

How Long Do Spark Plugs Last?

Spark plugs are crucially significant parts of your car’s engine. They set fire to the air-fuel mixture that generates your vehicle’s power, allowing it to move.  

But how long do spark plugs last? Spark plugs have different lifespans depending on the material they’re made of; this information is typically provided in the owner’s manual.

For Instance:

  • Silver spark plugs have a lifespan of up to 20,000 miles
  • Copper spark plugs have a lifespan of up to 30,000 miles 
  • Platinum spark plugs have a lifespan of up to 60,000 miles 
  • Iridium spark plugs have a lifespan of up to 100,000 miles 
spark plugs in a V8 engine

Advantages Of Using More Spark Plugs In A V8 Engine

Using additional spark plugs in a V8 engine can have the following advantages: 

  1. Increased Combustion Efficiency: Increasing the number of spark plugs in use results in a better and more effective combustion process. The power output may increase as a result of this.
  2. Better Throttle Response: Clean, efficient fuel combustion increases power output, which results in a more responsive driving experience.
  3. Reduced Emissions: Because of the increased number of spark plugs, the engine is able to burn fuel more efficiently, resulting in reduced pollution.
  4. Increased Engine Longevity: As a result of the enhanced combustion process, the engine experiences less wear and tear, extending the engine’s lifespan.
  5. Improved Performance: Engines with a greater number of spark plugs are able to generate more power and torque, which boosts acceleration and efficiency.

Difference Between V8 And V6:

The differences between “V8” and “V6” engines are not always clear to those who are not familiar with engine mechanics. These expressions are shorthand for talking about an engine’s cylinder count.  

Both the V8 and V6 engines have their cylinders arranged in a V shape, but the former has eight cylinders and the latter has six.  

The power of a V8 engine is significantly greater than that of a V6 engine. The extra cylinders in a V8 engine allow for greater power than in a six or four-cylinder engine of the same size.

This increases:

  • Torque
  • Horsepower

Allowing for:

  • Faster Acceleration
  • Greater Towing Capacity

But, this increased performance comes at the expense of fuel economy.

Hence, V8 engines are typically less efficient than their V6 counterparts.

While V8 engines offer more power and torque, most drivers will find that the V6 offers more than enough for their needs.

Additionally, V6 engines are more fuel-efficient than 8-cylinder engines due to their reduced cylinder count. 

If you need maximum output and performance, a V8 engine is your best bet. 

If you’re more concerned with fuel economy and general practicality, however, a V6 engine may be the better option.

How To Replace Spark Plugs?

Here is a step-by-step guide on how to replace spark plugs in a typical gasoline engine: 

Step-1) Gather Necessary Tools And Materials:

In order to replace spark plugs in your car, you will need:

Suitable Socket Wrench
A Spark Plug Socket
A Spark Plug Gap Tool
Suitable Replacement Spark Plugs

Step-2) Locate The Spark Plugs And Replace The Wire: 

Usually, there are eight spark plugs on each side of a V8 engine. Find out where the spark plugs are by consulting the manual that came with your car or a repair manual.

Now carefully, grasp the spark plug wire’s boot and gently pull it away from the spark plug, one at a time. If you want to avoid damaging the wire, avoid pulling on it.

Step-3) Remove The Old Spark Plug and Check The Gap:

To change spark plugs, turn them counterclockwise in a spark plug socket. Once it is free, you can take out the spark plug manually.

The new spark plug gap can be determined with a spark plug gap gauge. The void must conform to the requirements detailed in the car’s manual.

Step-4) Change Spark Plugs And Reattach The Wire:

Make sure the new spark plugs threads are straight before inserting them into the socket. After you’ve tightened it by hand, use a socket wrench to get it even snugger.

When you change spark plugs, the wire boot must be pushed onto the plug until a click is heard. All of the other spark plugs should be treated in the same way. 

Repeat steps 3–7 for each of the remaining spark plugs. 

Step-5) Start The Engine:

After checking and replacing all of the spark plugs, start the engine and pay attention to any strange noises. If everything appears to be in order, you can stop now.

Keep in mind that spark plug maintenance for V8 engines is critical to enjoying the power they offer. Replacing spark plugs in V8 at the proper time will keep your car running properly.

Plus, make sure to conduct your research for the best spark plug manufacturers before making a purchase.

FAQs About Spark Plugs:

Q: What Are The Signs of Bad Spark Plugs In V8 Engines? 

A: A faulty spark plug may be the root of many engine problems. There are a few telltale indicators that it’s time to replace your spark plugs.

The most common Signs of bad spark plugs in V8 engines include:

Trouble starting the car 
The engine check light is on
Misfires cause the engine to shake
Increased emissions 
Decreased fuel economy 

To keep your car running smoothly and efficiently, check the spark plugs if you’ve noticed any of these issues, and replacing spark plugs in V8 can avoid premature engine damage.

Q: What Are The Kinds Of Spark Plugs? 

A: There are many varieties of spark plugs on the market, each with its own set of benefits.

Spark plugs can be made from a variety of materials, but silvercopperplatinum, and iridium spark plugs are some of the most common.

Silver Spark Plugs are the most cost-effective option and can last for up to 20,000 miles before they need to be replaced. However, they don’t hold up as well as other spark plugs and aren’t a good choice for high-performance or heavy-duty vehicles.

Copper Spark Plugs are a popular choice for many because these spark plugs work for up to 30,000 miles before needing spark plug replacement. Copper spark plugs perform well in most situations and are not highly-priced.

Platinum Spark Plugs are more costly than silver or copper plugs, but they last longer, with a longevity of up to 60,000 miles. They can help you save money at the pump and are a great option for high-performance or heavy-duty use.

Iridium Spark Plugs are the priciest option, but these spark plugs work the longest (up to 100,000 miles) and are therefore worth the extra money. They’re built to last and can serve a variety of purposes with top-notch efficiency and performance. You won’t find good spark plugs per cylinder than this.

Q: Can a V8 Have Six Spark Plugs?

A: Each of the eight cylinders in a V8 engine needs its own spark plug in order to ignite the air-fuel mixture. This means that in a V8 engine, there is one spark plug per cylinder, for a total of 8 in an internal combustion engine. 

A V8 engine cannot function with only 6 spark plugs because this would leave some cylinders without one, leading to inefficient combustion and poor performance.  

However, as we’ve covered before, dual ignition technology allows a V8 engine to have two spark plugs per cylinder.

This is possible in cars with dual-spark engines because just one spark plug per cylinder fuel air mixture burns not as efficiently in the combustion chamber of an internal combustion engine.

Q: How Many Coil Packs Are In A V8?

A: A V8 engine’s coil pack count is variant on its configuration. If the V8 engine doesn’t have plug wires, then each cylinder will need its own ignition coil packs. The engine, then, will have 8 cylinders, and consequently 8 ignition coil packs.  

The number of spark plugs in an engine doesn’t matter; each cylinder still needs its own coil pack to produce the high voltage needed for a spark in the combustion chamber, whether the engine has a single spark plug or two spark plugs per cylinder. 

It’s important to remember that some engines still use distributor and spark plug wires rather than ignition coil packs. 

The ignition system and engine design will determine whether coil packs or spark plug wires are used.

Q: How Many Spark Plugs Do 6.4 Hemi Engines Have?

A: The 6.4-liter Hemi has sixteen plugs for ignition. There are sixteen spark plugs total, a second spark plug per cylinder of an eight-cylinder engine.

The 6.4-liter Hemi is a workhorse of an engine found in cars as diverse as Dodge Ram pickups, Jeep Grand Cherokees, and Chrysler 300s.

Maintaining the quality of all 16 spark plugs is crucial to the smooth and dependable operation of your vehicle. 

To get the most out of your 6.4 Hemi engine, you should do routine maintenance including changing old into new spark plugs.


In conclusion, it is crucial to any V8 vehicle’s maintenance to know how many spark plugs exist in the engine. Keep in mind that spark plug counts might change based on:

  • Engine Displacement
  • Design
  • Manufacturer

Twin-spark engines can use as many as 16 spark plugs, while as a standard there will be 8 plugs in a V8.

A professional technician should be consulted when spark plug replacement is necessary to ensure optimal spark plug choice for V8 modern engines.

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