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If you own a Subaru Forester, then you know the importance of keeping your spark plugs in top shape. Ignition is the first step in the combustion process, and without spark plugs, your engine simply won’t start. But not all spark plugs are created equal, so it’s important to choose the right ones for your vehicle. Here are our top picks for the best spark plugs for Subaru Forester:
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1. NGK Spark Plugs
If you’re looking for high performance and reliability, then NGK spark plugs are a safe bet. They’re made from high-quality materials and designed to withstand high temperatures and pressure. Plus, they offer excellent fuel efficiency, so you can save money at the pump. NGK’s patented Triple-Gasket sealing process also helps prevent leakage, which can cause engine misfires and reduce gas mileage.
2. Bosch Spark Plugs
Bosch is another brand that’s known for producing high-quality spark plugs. Their Platinum+4 spark plugs are designed with four ground electrodes, which helps improve performance and fuel efficiency. They’re also durable and built to last, so you won’t have to worry about replacing them frequently. Bosch spark plugs also come with a unique surface air gap technology that reduces wear and tear on the spark plug, which in turn extends its lifespan.
3. Denso Spark Plugs
Denso is a lesser-known brand but still produces high-quality spark plugs. Their Iridium Tough Spark Plugs are designed to deliver superior performance, fuel efficiency, and durability. They’re made from high-quality iridium and designed to last for up to 100,000 miles. Denso’s patented U-Groove ground electrode design also helps improve ignition and reduce misfires.
4. ACDelco Spark Plugs
ACDelco is a trusted brand in the automotive industry, and their Professional Iridium spark plugs are no exception. They’re designed to last up to 100,000 miles and offer excellent performance and fuel efficiency. Plus, they come with an iridium tip that’s six times harder and eight times stronger than platinum, so you can expect superior performance and longevity. ACDelco spark plugs also feature a rib-less insulator design that reduces the chance of misfires and eliminates the need for indexing.
5. Champion Spark Plugs
Champion is another well-respected brand in the automotive industry, and their Double Platinum Power spark plugs are a great choice for your Subaru Forester. They’re designed with an exclusive Heat-Active alloy that helps improve performance and longevity. Plus, they’re built to last for up to 100,000 miles, so you won’t have to replace them often. Champion spark plugs also feature a platinum pad that helps extend the lifespan of the spark plug and reduces the chance of misfires.
Some Tips and Ideas for Spark Plug Replacement
Replacing your spark plugs is a fairly simple process, but it’s important to do it correctly to avoid damaging your engine. Here are some tips and ideas to keep in mind:
- Always consult your vehicle’s owner’s manual before replacing your spark plugs. The manual will tell you how often the spark plugs need to be replaced and what type of spark plugs are recommended for your vehicle.
- Make sure your engine is cool before attempting to replace your spark plugs. Hot engine parts can cause severe burns.
- Use a spark plug socket and a ratchet to remove your old spark plugs. Don’t use pliers or other tools, as they can damage the spark plugs.
- Inspect your spark plugs for signs of wear and damage before replacing them. If the electrode is worn down or the insulator is cracked, then the spark plug needs to be replaced.
- Apply a small amount of anti-seize compound to the threads of your new spark plugs before installing them. This will make it easier to remove the spark plugs next time you need to replace them.
- Make sure the spark plugs are tightened to the manufacturer’s recommended torque specification. Over-tightening or under-tightening the spark plugs can cause damage to the engine.
- Always replace all of your spark plugs at the same time, even if only one is worn or damaged. This will help ensure even ignition and prevent misfires.
How to Replace Your Subaru Forester Spark Plugs
Here’s a step-by-step guide to replacing your spark plugs:
- Disconnect the negative battery cable to prevent any electrical shocks or damage to the electronics.
- Remove the spark plug wires from each spark plug by firmly pulling the boot away from the spark plug. Do not pull on the wire itself, as this can damage the wire.
- Use a spark plug socket and a ratchet to remove each spark plug. Turn the socket counterclockwise until the spark plug comes loose, and then pull it out of the engine.
- Clean the spark plug sockets with a wire brush or a clean rag. This will remove any dirt, debris, or oil that may have accumulated in the sockets.
- Inspect each spark plug for signs of wear and damage. If the electrode is worn down or the insulator is cracked, then the spark plug needs to be replaced.
- Apply a small amount of anti-seize compound to the threads of each new spark plug before installing it. This will make it easier to remove the spark plugs next time you need to replace them.
- Use a spark plug socket and a ratchet to install each new spark plug. Turn the socket clockwise until the spark plug is snug, and then tighten it to the manufacturer’s recommended torque specification.
- Reconnect the spark plug wires to each spark plug by firmly pushing the boot onto the spark plug. Make sure the boots are securely in place to prevent misfires.
- Reconnect the negative battery cable to restore power to the vehicle.
By following these tips and ideas, you can ensure that your Subaru Forester’s spark plugs are in top shape and functioning properly. Remember to always use high-quality spark plugs to keep your engine running smoothly and efficiently.
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