BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > i'm about to change my spark plugs...

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      08-27-2010, 01:35 PM   #1
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i'm about to change my spark plugs...

do i need the copper anti-seize or not? bentley manual says yes...ngk website says no. I have about 65k miles on it now and i will probably change them again in another 40-50k miles...please help
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      08-27-2010, 05:58 PM   #2
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To the best of my knowledge, anti-seize is only required on the spark plugs that don't have a special plating on their threads. If the spark plug manufacturer tells you it is not needed, it is not needed.

Repair manuals are written by mechanics, and need to make generic recommendations that work for most if not all scenarios. Manufacturer engineers make the recommendation based on the specifics of the product they have designed.

In any case, I have never had any problems with/without anti-seize compound. Every time I have used it though, I have made sure to not torque to the specified value by the manufacturer, rather go by the angle (1/4 turn passed hand tight.)
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      08-27-2010, 06:01 PM   #3
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Go with what ngk says and do what faz said above, hand tight + 1/4 turn.
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      08-27-2010, 06:06 PM   #4
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Being its a DOHC engine there is no need, on older OHV style engine's it was a good idea because the plugs were somewhat exposed to the elements.

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      08-27-2010, 10:12 PM   #5
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I changed mine last week and applies the copper-based anti-sieze compund. (I found nt at Napa.) I used it due to the Bently manual - I'm sure it can't hurt...
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