Coil Covers For Car, Coil Covers For Car: 4 Reasons Why You Car Needs Coil Covers, KevweAuto

Coil Covers For Car: 4 Reasons Why You Car Needs Coil Covers

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Your car’s ignition system is crucial for getting the engine started and keeping it running smoothly. At the heart of this system are the ignition coils – specialized transformers that deliver the high voltage needed to create a spark to ignite the fuel-air mixture in the cylinders. However, these ignition coils can be vulnerable to damage from moisture, dirt, heat, and vibration. Using custom coil covers is an easy and affordable way to protect your coils.

Why Your Ignition Coils Need Protection

Coil Covers For Car, Coil Covers For Car: 4 Reasons Why You Car Needs Coil Covers, KevweAuto

Modern ignition coils are very sophisticated, often using integrated circuits and delicate windings to generate tens of thousands of volts. This makes them susceptible to several threats:

  • Moisture – Water getting into the coils can short out the windings or cause corrosion. Just small amounts of rain, splashing water, or humidity can wreak havoc over time.
  • Dirt and debris – Dust, sand, and grit can work their way into tiny crevices, causing abrasion damage or short circuits. Road grime thrown up by the tires is a common cause.
  • Engine heat – The high temperatures around the engine compartment take a toll on coil components, especially plastic parts, adhesives, and wire insulation. Prolonged heat exposure accelerates aging.
  • Vibration – The pulses of voltage through a coil create strong electromagnetic fields that vibrate the coil at high frequencies. These vibrations can weaken solder joints, windings, and if an underlying mechanical issue exists with part of the ignition system.

Custom coil covers are the ideal solution, creating a sealed barrier against all these threats to maximize the lifespan of your precious ignition coils.

Materials Used for Quality Coil Covers

Coil covers come in many designs, but the best ones use materials that can withstand the under-hood environment while providing protection. Here are some key properties to look for:

1. Thermal Stability

Covers made from silicone, high-temp nylon or polyurethane plastics, fiberglass, or ballistic nylon can all handle temperatures exceeding 200°F without deformation or degradation. Lower grade plastics become too soft or brittle with heat aging.

2. Moisture and Dust Resistance

Silicone, polyurethane, and thermoplastic elastomer (TPE) materials excel at sealing out water, humidity, and dust. Their elasticity allows them to conform tightly to complex coil shapes. Avoid porous fabrics or finishes that absorb moisture.

3. Durability

Look for tough, abrasion-resistant exterior finishes. Powder coated aluminum, nylon, ballistic nylon, and fiberglass covers stand up well to under-hood scrapes and scuffs from tools or engine movement. Softer silicone covers offer cushioning.

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4. Chemical Resistance

Materials like silicone rubber, polyurethane, nylon, and thermoplastic elastomer stand up to oil, coolant, battery acid, and other corrosive under-hood chemicals far better than natural rubber or inferior plastics. This prevents degradation, swelling, or cracks.

5. Vibration Damping

Using an elastomeric material like silicone rubber or TPE reduces vibration transmission through the cover. This cushions the coil’s delicate internal components from damage. Solid plastics transmit more vibration.

The most protective coil covers use high-tech thermally stable materials with sealed moisture barriers, chemical and abrasion resistance, and vibration dampening. Now let’s look at some design options.

Coil Cover Designs for Different Needs

Coil covers come in many configurations for custom fits and features:

1. Individual Coil Pack Covers

These encase each ignition coil separately and are the most popular universal design. This allows easily wrapping coils of different sizes and shapes. Individual covers also permit replacing just one if needed.

2. Full Set Covers

These options mold over a whole bank of coils as one integrated shield. This can be either custom molded to an exact coil layout or use a flexible material to conform to various configurations. Full set covers have a seamless design and faster installation.

3. Ballistic Nylon Wraps

Offering great abrasion protection, these covers use durable nylon shells over a thermal barrier padding. The wrap construction adjusts to different sizes and usually secures with Velcro closures. This style is best for exposed coils near the headers.

4. Neoprene Sock Covers

Stretchy wet suit type neoprene materials help insulate coils from heat while resisting moisture and dust ingress. The socks pull over the coils and stay in place snugly. These offer basic protection at low cost.

5. Silicone Molded Covers

Custom molded silicone is the premier cover option, forming perfect fitting shields over each coil. The flexible material prevents vibration transmission and seals out all contaminants. Molding maintains ground clearances.

6. Aluminum Powder Coated

Powder coated aluminum covers offer the ultimate heat reflection and rugged outer armor. They attach with brackets to position precisely over coils and are favored by extreme environment drifters and rally racers. Cost is higher but lifespan is maximized.

So whether you need universal fit or custom covers, basic protection or severe duty, there are coil cover solutions to keep your ignition running flawlessly.

Selecting the Correct Coil Covers for Your Vehicle

With all the coil cover choices available, it’s important to select the right covers for your specific vehicle’s ignition system. Follow these steps for guaranteed fit and compatibility:

1. Check Your Coil Type

Many modern engines use compact coil-on-plug (COP) design which mounts the coils directly on top of each spark plug. Older engines used rail or pack-style coils located away from the plugs. Verify which type your vehicle has.

2. Count Your Cylinders

Note how many cylinders your engine has and whether the coils are in one bank or split into two banks. This determines the number of covers needed. Most 4 cylinder engines have the coils on one side while 6 and 8 cylinder engines have split banks.

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3. Note the Configuration

Observe the physical coil layout and the shape and size of each coil. Measure the base diameter and height. Also see if the coils sit upright, sideways, or at an angle. This aids in selecting covers that orient and fit correctly.

4. Match Electrical Connectors

Check that the coil covers you choose have cutouts, slots or openings in the design to accommodate the electrical connector and wire exiting each coil. You want the cover to protect the coil without impeding the wiring.

5. Review Access Needs

Determine any other components the coil covers could potentially obstruct, like spark plug wire routing or adjacent hoses/tubing. Ensure your chosen covers don’t block required maintenance access.

6. Research Your Options

Cross-reference your vehicle make, model, and year with coil cover manufacturers to find compatible options. Many companies have lookup tools to see pre-fitted covers for your specific coils. Custom molding is also available.

Taking the time to carefully evaluate your engine’s ignition coils and research the right covers pays off by keeping your coils running reliably for years before needing replacement. Protect your investment with durable covers.

DIY Installation Tips for Coil Covers

Coil Covers For Car, Coil Covers For Car: 4 Reasons Why You Car Needs Coil Covers, KevweAuto

Once you’ve selected the right coil covers for your vehicle, it’s just a matter of installing them properly for the best protection. Here are some pro tips for DIY installation success:

1. Clean the Coils

Start with freshly cleaned ignition coils so the covers adhere well. Carefully remove any dirt or oil residue using electrical contact cleaner or alcohol on a lint-free rag. Allow coils to fully dry before attaching covers.

2. Check Condition

Inspect coils closely for any cracks or damage before covering. It’s good practice to replace any questionable coils when installing new covers. Preventative maintenance saves future headaches.

3. Review Instructions

Read the manufacturer’s directions to understand required preparation, fittings, adhesive types, cure times, and optimal process order. Don’t skip steps that ensure maximum performance.

4. Fit and Orient Properly

Test fit covers first without adhesive to confirm they align correctly and don’t interfere with any engine components in the operational position. Make alignment marks if needed before adhering.

5. Apply Adhesive Wisely

Sparingly apply adhesive only to the instructed surfaces indicated in the directions. Avoid squeezing out excess that could spread where not wanted. Always give adhesive time to fully cure.

6. Secure Other Fasteners

If the covers use mechanical fasteners like screws or brackets, install these precisely as specified. Do not overtighten. Use anti-seize lubricant on stainless fasteners to prevent galling.

7. Heat Cure as Needed

If instructed, use a heat gun on low setting to gently warm covers for optimal adhesive curing. Avoid overheating coils during this process. Only apply heat directed in the directions.

8. Inspect the Installation

Once covers are secured, visually inspect the fit, alignment, and clearances all the way around. Realign or adjust if any issues are seen. The goal is 100% sealed protection.

9. Shake Test

Gently tug and shake covers after installation to verify adequate strength of bonding. They should not detach or exhibit any movement if installed correctly.

Following the proper process ensures your new ignition coil covers maintain their protective abilities for maximum longevity. Taking preventative measures now avoids expensive future coil replacements.

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Symptoms of Failing or Damaged Ignition Coils

Coil Covers For Car, Coil Covers For Car: 4 Reasons Why You Car Needs Coil Covers, KevweAuto

While coil covers help prevent premature failure, it’s still important to monitor your ignition coils for any symptoms of damage or impending breakdown. Catching problems early reduces the chances of being left stranded with a non-running engine. Be alert for any of these warning signs:

  • Difficulty Starting – Takes multiple rotations to get the engine firing.
  • Misfiring – Noticeable power loss or sputtering as unburned fuel ignites in exhaust.
  • Rough Idling – Engine lacks smoothness and rpm dips noticeably at idle.
  • Check Engine Light – Fault code(s) triggered by ignition issues.
  • Gasoline Smell – Raw fuel odor from unburned excess escaping the exhaust.
  • Poor Acceleration – Lack of normal power when accelerating points to ignition problems.
  • Failed Emissions Test – Higher than normal hydrocarbon levels detected.
  • Oil Leakage – Damage allowing ignition arc to escape can breach the coil casing.

Addressing coil issues promptly reduces the chances of catalytic converter or engine damage from ongoing misfires. While replacement restores performance, protective coil covers are an inexpensive insurance policy against premature failure in the future.

Ask Your Mechanic Key Questions About Ignition Coils

Coil Covers For Car, Coil Covers For Car: 4 Reasons Why You Car Needs Coil Covers, KevweAuto

If you suspect ignition coil trouble based on the above symptoms, it’s smart to have your vehicle professionally inspected and serviced. To gain the right insight from your automotive technician, be sure to ask these key questions:

  • Which coil(s) are faulty based on diagnostic testing? Know specifically which cylinders have the problem.
  • What is causing the failure? Understanding the root issue helps prevent another failure.
  • Is the spark plug also being replaced? A worn plug stresses the coil and leads to early demise.
  • Should all coils just be replaced together? If one failed, others may soon follow.
  • Are updated/upgraded coils available? Improved coil designs are continually released.
  • Will new coils be coated/sealed? Unprotected coils will have shorter lifespans.
  • What proactive maintenance helps? Ask about heat shields, dielectric grease, covers, etc.
  • How urgent is the repair? Diagnose and fix coil issues promptly to avoid bigger problems.
  • Do you recommend OE or aftermarket coils? Weigh factors like cost, availability, and warranty.

Being an informed customer means you can make the best decisions for repairing and protecting your ignition system. Do your research and partner with repair technicians focused on your vehicle’s reliability for the long haul.


Ignition coils play an absolutely vital role in your engine’s operation but sit vulnerable to damage from heat, vibration, moisture, and debris. Installing aftermarket coil covers tuned for your specific vehicle provides inexpensive insurance against premature coil failure.

Choose coil covers using high tech materials for sealing, insulation, vibration damping, and durability. Follow the manufacturer’s instructions for professional DIY installation and periodic maintenance. Watch for potential symptoms of failing coils and promptly seek qualified diagnosis and repair as needed.

Protecting your ignition with quality coil covers gives peace of mind motoring and helps your vehicle operate reliably for the long run. They are one of the wisest investments you can make under the hood. With so many quality options on the market, there’s no reason to leave your coils at risk. Get them covered and keep your engine’s spark buzzing.

Ejenakevwe Samuel

I'm Ejenakevwe Samuel, and my blog is all about sharing the love for cars. Through my blog, I pour my heart into educating fellow car enthusiasts in everything they need to know about their beloved rides. Whether it's driving tips, maintenance tricks, or the latest trends, I aim to empower others to make informed decisions and take care of their vehicles like a pro.

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