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How To Change Spark Plugs

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WHAT YOU NEED

  • Ratchet (3/8 or 1/2 inch drive)
  • Magnetic spark plug socket same size as ratchet (vehicle specific)
  • Pilers
  • Latex gloves or old rubber gloves
  • Socket extension bar
  • Rags
  • Magnetic pickup
    tool (if possible)
  • Flat head screwdriver

STEP BY STEP
INSTRUCTIONS

by local expert Patrick Patel

Step 1

To change spark plugs, turn your car off and take the keys out before opening the bonnet. Locate the engine cover and remove it.

Step 2

Remove the coil packs. There are 2 types: coil packs which are individually secured can be removed individually, and coil packs bound together - these need to be removed in one. Top tip: even after removing the securing bolts, the coil packs may need a little wiggle from the base.

Step 3

Using the extension bar attached to the spark plug socket, make sure the spark plug socket is placed on the plug at a straight angle. It should feel tight and the extension bar should not wiggle around. Then slowly loosen and remove each spark plug at a time.

Step 4

Place each new plug into the spark plug socket and slightly tighten each spark plug, bearing in mind to hold the extension along with the socket very straight to avoid damaging the screw threads. Then tighten each spark plug one at a time, but be sure not to over-exert while tightening - this could snap the plug.

Step 5

Once the plugs are in put the coil packs back into place and attach the connectors, exactly the same way as they were taken off. Use the marks made earlier or the pictures taken in order to be sure the connectors are plugged in the correct order.

Step 6

Put the engine cover back on, start the engine and run it for a few minutes. Listen for any abnormal vibrations or erratic idling.

If you run into any difficulty, CONTACT A LOCAL
MECHANIC - we've thousands nationwide.

SAFETY INFORMATION

Do:

  • Use a magnetic pickup tool to pick the spark plug put of its hole
  • Buy a torque ratchet if you're unsure about how much force to use while tightening the spark plug. A car manual will detail the correct torque setting

Don't:

  • Use excessive force to open the clips on the coil as they usually don't require much force to come on if unclipped in the right manner
  • Put a plug in at the wrong angle - if so the spark plug will feel very tight after just a few turns
  • Drop any tools, sockets or liquid in the gap when spark plug is out

WHAT YOU NEED

  • Ratchet (3/8 or 1/2 inch drive)
  • Magnetic spark plug socket same size as ratchet (vehicle specific)
  • Pilers
  • Latex gloves or old rubber gloves
  • Socket extension bar
  • Rags
  • Magnetic pickup
    tool (if possible)
  • Flat head screwdriver

Patrick Patel

Home Garage:
Automotive Components Specialist

  • Garage Specialisation:
    - MOT's and Servicing
    - Clutch repairs
    - BMW's, Audi's, VW and Mercedes

  • Top tip:
    Check your lights regularly, particularly in the winter months.

  • Favourite Driving Song:
    Michael Jackson - Thriller