Spark Plugs & Wires

The owner's manual lists the following plugs:

The gap should be 0.028" -- 0.035" (0.7mm -- 0.9mm)

Note that some people report that platinum plugs work well in this engine, while others say that they cause problems. Make your own decision.

  1. The connectors come off using a special tool that should be clipped onto the forward most connector.
  2. You can use the tool provided for the wheel bolts to remove the plugs, or use a 5/8" spark plug socket with a long 10" extension with a locking connector on the end (a MUST; otherwise when you pull the extension out after installing the plug, the socket will stay stuck to the plug).
  3. Make SURE your new plugs have a 5/8" hex; the larger 13/16" hex plugs won't fit, no matter what the parts book says at the auto parts store.
  4. When installing, use a LITTLE anti-seize compound and the shop manual says tightening specks are 15 ft-lbs. Make sure your spark plug socket has the rubber insert to hold the plug so you can get it out.

Plug Wires

The OEM wires can be expensive to buy from the dealer, but there aren't many options since the connectors on the 20 valve engine are unusual. The original Bosch wires can be found in the aftermarket if you look hard enough. Rapid Parts (914-352-1138) sells Blue Ignitors that will fit this engine, and Magnecor makes compatible sets as well. Magnecor will give you a slight discount (~$10) if you mention that you heard about them through the internet Audi lists. Blaufergnugen has some available as well.

Stay away from Nology wires or any other company that tells you their wires will increase performance. The only performance increase that you will notice by replacing plug wires is if your old wires have a problem. What you should look for in a wire is quality construction and durability. Good sheilding prevents electrical interference, which is especially important in the 20 valve engine because it has EFI.

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