Why Spark Plugs Matter for Your Car's Health
Spark plugs play a crucial role in your vehicle's combustion system, igniting air-fuel mixtures to power your engine. Worn or dirty plugs can reduce fuel efficiency by up to 12% (U.S. Department of Energy) and negatively impact emissions. This guide helps car owners replace plugs without professional assistance.
Tools You Need Before Starting
- Spark plug socket (5/8" or 13mm depending on your vehicle)
- Ratchet with extension
- Digital gap tool
- Anti-seize compound
- Dielectric grease
- New manufacturer-approved spark plugs
- Wire brush
- Safety gloves and glasses
Safety First: Preparing Your Work Area
Create a safe workspace by parking on level ground and disconnecting the car battery. Wait 30 minutes after engine operation for adequate cooling. Ensure proper ventilation when working with gasoline engine components. Never attempt replacement while the engine is hot to avoid cylinder head thread damage.
Selecting the Right Spark Plugs
Modern vehicles typically require Iridium or Platinum-tipped plugs for longevity. Check your manual for