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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 08-01-2005, 02:05 PM   #1
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Spark plug anti seize compound?

Is it required? What happens if you don't use it? Are the plugs just harder to remove, or are they impossible to remove?

Thanks.
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Old 08-01-2005, 02:30 PM   #2
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depends on how long you have it on there.
go to your local auto store and ask for anti-seize that's safe for spark plugs, it makes things easier next time around.
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Old 08-01-2005, 03:13 PM   #3
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but dont go nutty putting it on.. a very small amount will work.
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Old 08-01-2005, 03:54 PM   #4
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what happens if you put to much on?
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Old 08-01-2005, 04:40 PM   #5
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Porsche is the source for nixing the anti-sieze, where if you use too much it allegedly will foul the plugs.
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Old 08-02-2005, 11:20 AM   #6
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Use copper-based anti-sieze compound.
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Old 08-02-2005, 08:08 PM   #7
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I imagine the threads should be plenty enough to hold the spark plug in, and it's usually only hand-tightened. Why would you need to use anti-seize?
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Old 08-03-2005, 07:05 AM   #8
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Plugs need to be tightened to a specific torque. I don't have the Bentley manual with me so I can oly guess it's about 20ft-lbs or so. The anti-sieze is there to ensure that you can remove the plugs without problems.
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Old 08-03-2005, 01:43 PM   #9
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The head is aluminum and the plugs are steel, so there is an electrical potential where they touch. The aluminum head is more electrically active than the steel, so aluminum electroplates to the steel plugs through a galvanic reaction that some call cold welding.
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Old 08-03-2005, 02:18 PM   #10
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Quote:
Originally Posted by Tom Busby
The head is aluminum and the plugs are steel, so there is an electrical potential where they touch. The aluminum head is more electrically active than the steel, so aluminum electroplates to the steel plugs through a galvanic reaction that some call cold welding.
Couldn't have said it better!!!!
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Old 08-03-2005, 02:45 PM   #11
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Quote:
Originally Posted by Tom Busby
The head is aluminum and the plugs are steel, so there is an electrical potential where they touch. The aluminum head is more electrically active than the steel, so aluminum electroplates to the steel plugs through a galvanic reaction that some call cold welding.

uh..... so what does that mean? i need to go back to school
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Old 08-03-2005, 03:19 PM   #12
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It's 18 ft/lbs

Quote:
Originally Posted by markusmark
Plugs need to be tightened to a specific torque. I don't have the Bentley manual with me so I can oly guess it's about 20ft-lbs or so. The anti-sieze is there to ensure that you can remove the plugs without problems.
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