Iridium Spark Plugs

[Mijostyn]

My car is a 2006 C4S. As I have the car apart I might as well replace the plugs as they have 25K miles on them. Denso makes Iridium plugs for this car. Pelican Parts stock them. Has anyone tried them?

Are they a good idea? They are supposed to last longer and replacing the darn things is a knuckle scraping affair. 

[JFP in PA]

Denso Iridium's will work fine.

[Mijostyn]

Thanx JFP. Any words of wisdom for getting the plugs back in?  I know you are supposed to tighten them to 22 ft lb. But I doubt I will be able to get a torque wrench on the rear most two plugs. The muffler brackets are in the way.

[JFP in PA]

Remove the muffler brackets and you should be able to get to them.  Use a small dab of high temp anti-seize on the  plug threads before you torque them to spec.

[Mijostyn]

I'd love to but the nuts that hold the mufflers to the brackets are rusted so bad I would have to cut them off. In order to get the brackets with the mufflers attached off I think I would have to take off the bumper and some heat shields? When I rebuild the exhaust system I am going to use all stainless hardware. I have everything off but the mufflers including the headers. The only place you can not use stainless is the header bolts as you never want to put stainless into aluminum but the rest of the exhaust including the brackets are stainless. The only logical reason that Porsche would use plain steel nuts on stainless bolts is just cheapness.

[Mijostyn]

I'd love to but the nuts that hold the mufflers to the brackets are rusted so bad I would have to cut them off. In order to get the brackets with the mufflers attached off I think I would have to take off the bumper and some heat shields? When I rebuild the exhaust system I am going to use all stainless hardware. I have everything off but the mufflers including the headers. The only place you can not use stainless is the header bolts as you never want to put stainless into aluminum but the rest of the exhaust including the brackets are stainless. The only logical reason that Porsche would use plain steel nuts on stainless bolts is just cheapness.

 

 

I would like to report with proper juggling of 2" and 3" extensions and a magnetic spark plug socket you can change your spark plugs including getting your torque wrench to bear on all 6 plugs without removing the muffler brackets. The only penalty is a few skinned knuckles.   

Edited September 15, 2018 by Mijostyn