Best $60 spent so far - spark plugs
08-04-2012, 01:58 PM
#21
Senior Members
I just did my spark plugs also at 85k miles. I have the N52 motor. I used NGK irridium plugs. The original plugs were labeled BMW on one side and NGK on the other and were also irridium plugs. (2006 525i, build date 7/2005)
I used a deep standard socket to remove the plugs...no problem. With the N54 engine you need a 12 point spark plug socket. Not sure when a thin walled socket is needed.
Always apply copper based anti seize compound on the threads. Torque to 18 ft-pounds (216 inch-pounds)
Car seemed to run smoother.....Getting better at removing all the plastic and rubber stuff to get at the engine.
I used a deep standard socket to remove the plugs...no problem. With the N54 engine you need a 12 point spark plug socket. Not sure when a thin walled socket is needed.
Always apply copper based anti seize compound on the threads. Torque to 18 ft-pounds (216 inch-pounds)
Car seemed to run smoother.....Getting better at removing all the plastic and rubber stuff to get at the engine.
http://www.autozone.com/autozone/acc...ntifier=526814
08-04-2012, 06:45 PM
#22
Members
Anti seize compound, something like this? Need to pick some up if so, didn't know about this.
http://www.autozone....entifier=526814
http://www.autozone....entifier=526814
There is no need to use anti-seize on modern Nickel plated spark plugs. Although Copper will likely cause no harm, other compounds will fuse dissimilar metals over time. Take care to read the contents and warnings.
A good excerpt from a spark plug manufacturer:
1) Nickel plating on spark plug threads prevent corrosion.
2) Adding any lubricant to threads changes the torque and allows spark plugs to be over tightened.
3) Spark plugs spend their life dissipating the heat of combustion. Two of the major paths of dissipation are the contact area between the cylinder head and the seat of the spark plug, and the contact area between the threads of the cylinder head and the threads of the spark plug. Lubrication in these areas change the heat transfer properties and the spark plugs will retain more heat than needed.
08-04-2012, 08:28 PM
#23
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Join Date: Nov 2011
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My Ride: 2008 AW N52 with sports package & premium package; natural brown interior
MODs:
Orion V2s
3000K H8 Yellow Fogs
Matte Black Kidney Grills
20" Miro 111
Hankook V12 Tires
H&R Sport Springs
Special coding via Simon (dbl flash hazards, digital velocity, etc.)
LED Side Markers from Trinity Autosports
LED License Plate Lights from Trinity Autosports
Carbon Delete
BMC Air Filter
RPI Scoop
RPI GT Exhaust
Future MODs:
Mtech Kit
KW Variant 2 Coilovers
CIC Retrofit
Upgrade Audio System
Thanks for this very informative thread.
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