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I will be changing my sparkplugs and seem to remember they sit inside tubes that have oil seals at either end. (There were tube leaks under warranty but not since.)

Being the first time I am changing the plugs, I am wondering if the tube oil seals are replaceable without taking off the valve covers and if so is it wise to replace them as a preventative measure.



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I did mine and it is quite easy to do if you have lift. If not, you will have to remove the rear bumper and mufflers. Here is what you will need.

Spark plug tubes - 996.105.325.52 (6 per car)

use special grease 999.917.788.00

small end o-ring - 999.707.343.40 (6 per car)

larger end o-ring - 999.707.215.40 (6 per car)

Here are some instructions from RFM here on the site that really helped me.

Hello Phillip

I have a lift, in my case i can do it without removing anything which is an advantage in time. It is better in your case to remove the wheels, the bumper and the mufflers to create more room. Remove the heat shields and the coils first, with 2 flat screw drivers you can pull the tubes out or with a set of pliers used to remove snap rings on wheel bearings with a spring between the handles, they work inside out. Grab the tube at max. 5mm inside ( if you go further in, the tube will crack in several pieces and fall inside the cover ) turn a little to the left and to the right while pulling out. To reinstall the new tubes with new O-rings lubricate the rings with a small amount of grease, take the tubes easy in possition till you have approx. 1cm to go, than push with your both thumbs hard and in one movement the tube in till you hear and feels a click, the tube is installed now.

Good luck!!


Edited by phillipj
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Only once have a tried to remove a tube, on a Boxster. The engine was warm and I removed the spark plug. I stuck my finger inside the tube and pulled it out with my finger. Nothing fancy. Maybe that was my lucky day.

Porsche has a fancy tool for removing the tube. I have never seen it at my local dealership. They just pry on the end with a small pry bar.

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