Ever wonder how and when to replace your Honda Accord spark plugs? Replacing the spark plug involves a series of five steps and can be done if you have a moderate understanding of engines. Changing them isn’t difficult. However, you will need to be familiar with engine parts.
Contents
How to Replace and Change Honda Accord Spark Plugs
Time: 1.5 hours
Difficulty Level: Moderate
Honda recommends that their spark plugs be changed every 105,000 miles. If the engine code indicates a misfire, check the plugs, regardless of mileage, since they could be worn.
Engine spark plugs are important for maintaining maximum performance. Although you may not see improvement in terms of gas mileage, performance should increase and error codes should diminish as well.
Please note that fixes depend on the engine. Older four-cylinder models will have a distributor with wires going to the plugs. Conversely, V6 models may have covers over their plugs. They will also have individual coils over each plug, distributing sparks individually from the distributor.
Materials Required:
- Plug gapping tool
- 3/8” ratchet, universal joint, and extension
- 7/32” Allen wrench or hex head (6-cylinder version)
- 5/8” spark plug socket or deep well
- Tape
- Coin (used for removing slotted connectors)
- Boot grease and anti-seize (optional)
- Shop vacuum
First Step: Removing Coils or Plug Wires
4-Cylinder Model
In this model, you will find the spark plugs at the end of your plug wires located in the engine block. Remove the covers. Then, grasping the boot until it disengages, pull off the plug wire. Be mindful never to pull it by the wire. The boot forms a tight seal that may require extra effort to break.
Note the location of each wire before removal. Label each with tape to make reassembly easier.
V6 Engine
Raise the hood of the car and find the spark plugs. For this model, they are under the engine covers behind your coils. Remove covers from your engine, removing the tabs or slotted fasteners. Be gentle while disengaging the tabs to avoid breakage.
Unscrew bolts on ignition coils, then disconnect your coils from your wiring harness. Pull coils off your plugs and set them aside.
Second Step: Remove Spark Plugs from Your Engine
Since your plugs are now accessible, the method is similar for each one of the individual plugs. Use the socket to unscrew each plug from your engine block. Use the extension so that you can reach the plugs. Use the universal joint if there are any obstructions.
Many sockets will have an insert that can handle this task. If there is a bare socket, place the rolled-up paper in it close to the top. Then, use either compressed air or a shop vac to remove dirt around the spark plug before removing it. This will prevent dirt from getting into the engine cylinder.
Third Step: Gap New Plugs
Using the plug gapping tool, check and set the gap. The specifications are found in the owner’s manual or on a label located under the hood. A parts person can look it up as well.
Fourth Step: Re-Install Spark Plugs
Begin by inserting the plugs into the engine by placing them into the spark plug socket. First tighten them with your fingers so the threads are protected. Then, tighten your plug to torque specifications. Refrain from over-tightening it as you can damage your engine, plug, or both.
When tightening the plugs, apply steady, even pressure. Avoid going off-center or pressing hard on the lever. Any slip can cause the ceramic on the plug to crack.
Use boot grease and anti-seize at this point if your engine encounters a great deal of moisture or road salt.
Fifth Step: Replace Covers and Wires
4-Cylinder
Seat your plug wires by putting your boot firmly over your plug. You should be able to feel or hear it snap into place.
V6
Replace the coils on the spark plugs by pushing them firmly down until they seat. Tighten them with bolts and connect your electrical connectors.
While the covers are off, start your engine. Make sure it is running smoothly and error codes are absent. If there is a misfire code or the engine does not run smoothly, check your connections. Ensure the wires are connected to the correct plug. Once it is running as it should, turn off the car, replace the covers, and you’re done!
Best Honda Spark Plugs
Several spark plugs are designed for use in a Honda Accord. Most experts recommend iridium as it is more durable and improves your car’s performance.
NGK LKAR7BIX-11S Iridium IX Spark Plug
This set of four is for those looking to improve performance. It offers superior anti-fouling and a great throttle response. The tip creates high durability and a stable spark, and the tapered electrode minimizes electrical quenching.
Pros:
- Corrugated ribs prevent flashover
- The seal prevents combustion gas leaks
- Iridium alloy resists high temperatures, giving it strength in terms of electrical war and heat
Cons:
- Doesn’t work with all models
Genuine Honda Spark Plugs 12290-R70-A01
This spark plug is the best choice for a Honda Accord. It uses durable and high-quality metals and withstands the high temperatures and harsh conditions in your engine.
Pros:
- Iridium electrodes give it durability
- Higher melting point
- Perfectly fits most models
Cons:
- None
VPlus 4PCS Iridium Spark Plug
Used by professional car drivers, this product contains double iridium, making it extremely durable. Designed with colder heat ranges over factory plug. It can handle intense conditions.
Pros:
- Copper core gives better heat transfers
- Iridium ensures a slower wear
- Gives improved fuel efficiency
Cons:
- Not all plugs may be pre-gapped
- May come loose
NGK Laser Iridium Spark Plug
This product is a very economical spark plug for your Honda Accord. It provides lower emissions and improved fuel economy, and the trivalent metal plating provides anti-seizing and anti-corrosion. It is also very durable.
Pros:
- Strong
- Resistant to corrosion
- Designed to last and withstand high temperatures
Cons:
- None
E3 Spark Plugs e3.81 Automotive Spark Plug
This spark plug is designed for optimal performance. It decreases fuel consumption, increases power, and improves hydrocarbon emissions. Created with colder heat ranges in mind, it will enable performance modifications.
Pros:
- Improved fuel economy
- Good performance
Cons:
- May not work with all models
Replacing your Honda Accord’s spark plugs isn’t a difficult task. However, it does require knowledge of engine components and access to the proper tools. Always be sure to consult the owner’s manual before changing them to ensure you have the proper make and model for your vehicle.
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