Originally Posted by Soni

I need to change my spark plug and I don't wanna take my mods out so I took it to a shop where they have fix many BMW's and also building a E90 race car. Anyway long story short, he broke 2 coils while try to pull them out. luckly close by dealership had few coil in stock and was able to do it under warranty. So I will be more careful when you DIY this. Make sure you call your dealer and make sure they have coils in stock or else you gonna stuck when you have one or more coil break on you. Here is the picture where it broke. When we picked up the coil from the dealership, one of the tech mentioned this is a common breakage for them as well. Good luck!!
Attachment 235600

Originally Posted by RajSinghE92

Hey this is exactly the Same thing that happened to me last night! it broke in the exact same spot as well. can you please tell me how i can get it completely out now? will i have to take apart the entire thing and push it out or is there another simpler way? please let me know what i can do exactly or im going to have to take it to my local shop & im sure they will charge me a lot!

Originally Posted by JHR

I wonder if the coils are more likely to snap if the engine is not completely cooled down?. I could see how a warm engine would make the coil fitting tighter on the spark plug as well as making the coil plastic weaker.

Originally Posted by 123123123123

I have a torque wrench that goes up to 200 in lbs..which is approx 16.67ft lbs.
Is it okay for me to just use 16.67ft lbs? or do you guys recommend I get a a 17ft lbs/23nm torque wrench?

Originally Posted by kiwi29

Question, I know this is a n54/55 based thread but how tight do you torque on the plugs for n51s/52? I read earlier a guy saying 30nm but I just want to confirm and see if someone knows how much that is in ft./lb. or in./lb.?
And also, is it possible to use 335 spark plugs for a 328? If so, would it be worth it? Will it create better performance and how tight do I torque it?

Originally Posted by Dackelone

For the N55/N54 spark plugs they should be torqued to 23Nm.

23Nm = 17 Ft/Lbs. BMW stamps the torque right on the spark plug box.

Attachment 792047

DO NOT use spark plugs for a turbo engine in an NA engine!!! Make sure you use the correct plugs for your engine. Sometimes this changes for SULEV and ULEV cars too. So check with your dealer via your VIN. There is no magical secret power to be found by using different plugs. That was a myth used to sell those V-grooved plugs from years ago.

Just by changing your old worn spark plugs, your engine will feel stronger. Always use OE spark plugs!


Dach

Originally Posted by AccuracyAutomotive

Hey everyone, we just tackled this job here and found a way around the BMW socket. We took a 6 point 15mm and shaved down the outer walls. Worked like a charm with no issues on removal or installation.
Everything torqued and released just fine.

He are some pictures with a rough measurement on the dial calipers if you would like to be able to change these plugs without spending $$ on the BMW tool.

Thanks for all the great information in this thread.

Originally Posted by Dackelone

The BMW spark plugs have a 12 point base. I would feel better buying and using the special 12 point socket when it comes to something like this. Afterall the "special tool" only costs $20 at most places. Heck even your BMW parts dept sells them!