How To Change Spark Plugs on a Porsche 911 Carrera (2017-2019)

• Since you’ll be working on the engine, perform the spark plug replacement with a cold engine to eliminate the risk of burns.
• Additionally, you do not want to remove or install spark plugs when the engine is hot or you can damage the spark plug threads in the engine.
• Park your vehicle on a flat solid surface.
• Put on eye protection and gloves.
• Gather the required parts and tools.

• While the car is still on the ground, use a 19mm lug nut socket and breaker bar to just break loose the wheel bolts on each of the rear wheels. Don’t unscrew the wheel bolts.
• Choke front wheels to prevent the car from rolling forward.
• Locate the lifting points underneath the vehicle along the side skirts; on each side, there is a lifting point behind the front wheel and another in front of the rear wheel.
• To get one of the rear corners on a jack stand, start by lifting that side of the vehicle using the FRONT lifting point; this will also raise the rear of the vehicle.
• Once the rear of the vehicle is high enough, slide your jack stand along with the jack pad under the REAR jack point.
• Lower your vehicle so it rests on the jack stand.
• Repeat on the other side.
• Once the rear end is on jack stands, give your car a hard shove to ensure it’s stable.

• Remove the wheel bolts holding the rear wheels using a 19mm socket and breaker bar.
• To help with the wheel removal and reinstallation, we recommend you use two wheel bolt guides per wheel.

• Slide underneath the car from the rear on the left-hand side and find the heat shield that covers the ignition coils.
• As shown in the photo (courtesy of VektorPerformance), remove the U-shaped air hose that goes from the turbo obstructs by loosening both clamps.  
• Locate and remove two E10 bolts that hold the shield in place and maneuver the shield out of the way. 
• For each ignition coil, locate and remove the wiring connector at the top of the ignition coil by pressing down on the plastic tab and lifting the connector off.
• Remove T30 screws that secure the ignition coils.
• Remove each ignition coil, which will require some wiggling and twisting.
• Inspect your ignition coils for cracks; if any are cracked, should replace all of your ignition coils.

• Because of the limited access, use a spark plug socket with a suitable length extension and universal joint to remove the old spark plugs.
• When removed from the engine, visually inspect each spark plug for contaminants and deposits, as shown in the video from Dennis Kirk, Inc. The condition of spark plugs can reveal a lot about the engine condition. 
• Take extreme caution when installing the new spark plugs to avoid cross threading.
• Start by threading in the new spark plugs by hand using the spark plug socket and extension.
• Once the spark plugs are fully tightened by hand, use a PROPERLY CALIBRATED torque wrench to tighten each spark plug to 22 ft-lbs.
• If it feels like you’re over tightening the spark plug, stop before you strip the threads on the engine.

• Insert the ignition coils onto the spark plugs; you will need to use some force.
• Once the ignition coils are properly seated, torque the T30 screws to 8 ft-lbs or just hand tighten them until their snug.
• Reconnect the wiring connectors to the ignition coils.
• Re-install the heat shield and torque the E10 bolts to 10 ft-lbs or just hand tighten them until their snug.
• Reinstall the U-shaped air hose. 
• Be careful not to over-torque any of these fasteners.

Picture of turbo inlet pipe courtesy of VektorPerformance.

• Re-install your wheels and torque the wheel bolts to 118 ft-lbs; be sure to tighten the wheel bolts in a star pattern to ensure the wheels sit flush to the hubs.
• Lower each side of the vehicle by lifting from the front jack point, removing the jack stand, then lowering that side of the vehicle.
• Put up your tools and clean up.
• You’re all done!