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Spark Plugs Change Question
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Posted 7/18/2016 12:28 AM
ychung
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Date registered: Aug 2015
Location: SO CAL
Vehicle(s): 2004 G500, 2014 ML350, 2008 S550
Posts: 196
100
Spark Plugs Change Question

I've just changed spark plugs on 04 G500, I've ordered MB parts, but it was NGK plugs.
It took me about 3 hours and I had to take out some ignition coils, one on the left side and three on the right side.
I've used dielectric grease on the boot and anti seize on plug threads.
I was reading other forum about 2008 S550 which I'm going to change the plugs next week, and I've found out that some plugs, NGK and Bosch, don't require the use of anti seize, they actually do not recommend the use of anti seize.
They are saying that the threads are made with material that don't require anti seize, and if you use it, it will alter the torque specs.
I think I'm still going to use the anti seize, but want to share this with you to see what you think of this.
#233028
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Author
Posted 7/19/2016 9:26 AM
G-AMG
G-Class DIY Host




Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
1000
Re: Spark Plugs Change Question

*NO* Anti-Seize!

The plug threads are Zinc Chromate-Coated by design, and Anti-Seize is CONTRA-INDICATED.

Here is what NGK says:

http://www.jagrepair.com/images/AutoRepairPhotos/NGK_TB-0630111anti...
#233058 - in reply to #233028
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Posted 7/19/2016 11:03 AM
ychung
Veteran


Date registered: Aug 2015
Location: SO CAL
Vehicle(s): 2004 G500, 2014 ML350, 2008 S550
Posts: 196
100
Re: Spark Plugs Change Question

I guess there isn't much I can do to the ones that I've replaced last week.
I should've noticed it from your DIY in here.
Thanks for your clarification
#233059 - in reply to #233058
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