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defintiely do yourself. Took me 2 hours probably and the longest part of that was just jacking the car up and removing rear bumper (not sure if you have to do, I did since I was running a back up camera in my vert)
yup, no need to remove the bumper cover for the spark plugs...
And the real reason why change intervals vary depending on the market...(source: Porsche)
For vehicles as of model year 2012
Because of different fuel octane ratings, the change intervals for oil and spark plugs have been adapted to suit the various markets.
The mileage varies per Market A, B or C, but the 4 years remains constant.
Note there are two torque specs listed in the Porsche manual...
And from the Bosch manual, which coincides with what the Porsche manual states.
Do you apply anti seize to the new plug threads before installation?
I know this may distort the torque wrench reading , but may make future removal easier.
I have on everything from a lawn mower to aircraft. I thin light coating is all you need and with none of it on the insulator or electrodes (use an acid brush). Amazingly, I have never had a seized spark plug in almost 50 years or one that snapped off.
Note the comment in my post above that is from the Bosch spark plug manual.
Do you apply anti seize to the new plug threads before installation?
I know this may distort the torque wrench reading , but may make future removal easier.
Thoughts? What does Porsche say ?
I believe Porsche specifically states NO anti seize. I didn't put any on and I presume the last one done prior followed the Porsche Service Manual since it was done at Porsche, and I had no trouble removing them. None. Just torque to spec.
Just did a search in the Porsche manual, could not find anything as you stated. Do you have a source or where did you read it (forums don't count)?
No, the Porsche Manual doesn't state not to use it, it makes no reference to it being used at all. It's found in the Porsche Technical Bulletin 9102. There are several references to this found googling. Pelican also has a good post stating that Porsche doesn't recommend, the bulletin is a retroactive opinion and "the theory is that the anti-seize tends to act as an electrical insulator between the plug and the cylinder head. This could have detrimental effect on the firing of the spark due to loss of ground connection."
No, the Porsche Manual doesn't state not to use it, it makes no reference to it being used at all. It's found in the Porsche Technical Bulletin 9102. There are several references to this found googling.
Unfortunately forums mention it but do not produce a PDF of that Porsche Technical Bulletin. Once again, things spread from one forum to another without proper documentation.
Originally Posted by dannyk304
Pelican also has a good post stating that Porsche doesn't recommend, the bulletin is a retroactive opinion and "the theory is that the anti-seize tends to act as an electrical insulator between the plug and the cylinder head. This could have detrimental effect on the firing of the spark due to loss of ground connection."
And that is where I saw mention of it but with no PDF of the document. Depending on the exact wording which can make a difference "does not recommend" and "do not use" are not the same.
But Porsche is out to lunch if they think the only contact area is at the threads. The end where the seal and body of the spark plug touches the head, produces all the electrical contact you would need. Anyone have a 4-wire resistance meter; I highly doubt you'll notice a difference.
In any case, I am sure I still have my 430 HP even when using anti-seize.
Last edited by IXLR8; 11-29-2023 at 07:17 PM.
Reason: typo as usual
Unfortunately forums mention it but do not produce a PDF of that Porsche Technical Bulletin. Once again, things spread from one forum to another without proper documentation.
And that is where I saw mention of it but with no PDF of the document. Depending on the exact wording which can make a difference "does not recommend" and "do not use" are not the same.
But Porsche is out to lunch if they think the only contact area is at the threads. The end where the seal and body of the spark plug touches the head, produces all the electrical contact you would need. Anyone have a 4-wire resistance meter; I highly doubt you'll notice a difference.
In any case, I am sure I still have my 430 HP even when using anti-seize.
The reason not to use anti-seize is that it would affect the torque while installing the plugs.
No anti-seize used by Porsche, as mentioned in your other post.
Thanks! Do you remove the rear wheels for easier access?
Any of the plugs especially difficult to reach?
You’ll need a flexible ratchet spark plug adapter. The plug at the extreme end is the most different to remove. Just be careful not to apply torque at an angle when removing the plugs.
You’ll need a flexible ratchet spark plug adapter. The plug at the extreme end is the most different to remove. Just be careful not to apply torque at an angle when removing the plugs.
11-29-2023, 04:44 PM
