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DIY Spark Plug Replacement on 2020 G70 3.3T - Tips & Torque Specs?

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Mark S. · rep 0 · May 22, 6:22 AM · 1 replies · solved · Question

Vehicle: 2020 Genesis G70 3.3T

Hey everyone,

I'm planning to tackle the spark plug replacement on my 2020 Genesis G70 3.3T. It's just hit 60,000 miles, and I'd like to do this maintenance myself to save a bit on labor costs. I've done plugs on other cars before, but this is my first time with a Genesis, especially with the twin-turbo V6.

Has anyone here performed this DIY on their 3.3T? I'm curious about any special tools I might need, beyond the usual spark plug socket and torque wrench. Are there any specific challenges or tricky parts to watch out for, particularly with accessing the rear bank or dealing with the coil packs?

Also, what's the recommended torque specification for the spark plugs on this engine? I want to make sure I get it right to avoid any issues. Any advice or step-by-step tips would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 6:22 AM

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ClearTheCode admin answer:

Replacing spark plugs on your 2020 Genesis G70 3.3T is a manageable DIY task, and 60,000 miles is indeed the recommended interval for this engine. Here's a guide to help you through it:

  1. Gather Your Tools & Parts:

    • New OEM or equivalent iridium spark plugs (e.g., NGK SILZKR8E8G or equivalent). Ensure they are pre-gapped correctly for your engine, but always double-check.
    • Spark plug socket (typically 14mm thin-wall, 12-point for these engines).
    • Torque wrench (essential for proper installation).
    • Ratchet and various extensions (3-inch, 6-inch, 10-inch).
    • Coil pack puller (optional but highly recommended to prevent damage).
    • Dielectric grease (for coil pack boots).
    • Anti-seize compound (optional, check plug manufacturer's recommendation; many modern plugs come with a coating).
    • Compressed air (to clear debris around plugs).
    • Basic hand tools (screwdrivers, pliers).

  2. Preparation:

    • Ensure the engine is cool. Working on a hot engine can damage threads.
    • Disconnect the negative terminal of your battery for safety.
    • Remove the engine cover.

  3. Accessing & Replacing Plugs:

    • Carefully disconnect the electrical connector from each ignition coil.
    • Use your coil pack puller or gently twist and pull to remove each coil pack. Inspect them for cracks or damage.
    • Use compressed air to blow any debris from around the spark plug wells before removing the old plugs. This prevents contaminants from falling into the cylinders.
    • Using your spark plug socket and extension, carefully loosen and remove the old spark plugs. Inspect them for wear, oil fouling, or other issues.
    • Apply a small amount of dielectric grease inside the boot of each new coil pack.
    • Thread the new spark plugs in by hand first to avoid cross-threading. Once finger-tight, use your torque wrench.

  4. Torque Specification:

    • For the Genesis G70 3.3T, the recommended spark plug torque is typically 10.8 - 14.5 lb-ft (14.7 - 19.6 Nm). Always consult your vehicle's service manual for the most accurate specification.

  5. Reassembly:

    • Reinstall the coil packs, ensuring they seat firmly.
    • Reconnect the electrical connectors to the coil packs.
    • Reinstall the engine cover.
    • Reconnect the negative battery terminal.

When to See a Shop: If you encounter any stripped threads, a broken spark plug, or are uncomfortable with any step of the process, it's best to stop and consult a professional mechanic. Improper installation can lead to engine misfires (potentially triggering codes like P0301-P0306) or even damage to the cylinder head.

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