Porsche 718 Forum banner

4.0 Engine Spark Plug Change

6.8K views 52 replies 23 participants last post by  BobbyG  
#1 ·
Rather than pay dealer prices, I got my neighbouring garage (owner has a 993) to do the four-year service. They got it all done except for the spark plugs, which they and I have learned require a special socket. Others have run into this (here is a thread about it in here somewhere). I bit the bullet and went to the dealer. Total of $871.86 which includes $210.36 for the six plugs. Glad that doesn't need to be done too often.

I also wanted them to look at the seat heating module, which stopped working. They found a connector wasn't connected. Guess who was responsible after installing the short shifter? Duh, I should have looked. $189 would have bought a nice bottle of Scotch for Christmas. Such is life.
 
Discussion starter · #11 ·
Discussion starter · #15 ·
@OttawaSteve I changed mine myself a couple weeks ago, I used the special socket from Porsche and the NGK spark plugs from Porsche. I did not try the socket linked above but did try two others previously and they did not work.

It was tight, the body has a sharp metal edge that can cut the back of your hands but in reality one you get in there it is pretty easy and straight forward.

Remove heat shield, three torx screws per side and two wiring clips for the O2 sensor.
Remove coils, one screw and one wiring clip per coil. To remove wiring clip first push back the yellow tab.
Remove and replace spark plugs.

I did use the special Porsche socket and the new NGK spark plugs also came from Porsche. I used an assortment of socket extensions, one with a wobble as shown below for 5 of them, the left rear plug required a slightly different arrangement of extensions as I had to add a swivel.

The spark plugs did have some discoloration on the threads but the electrode did not look worn.

Let me know if there are any specific questions.

Image


Image
Excellent, how long did it take you?