Spark Plug Gap

MTM · 02-28-2015, 10:45 PM

I did some searching, and also posted here (http://www.m3post.com/forums/showthread.php?t=796536) but came up with nada...

Does anyone know the correct gap for the spark plugs? I know they are supposed to be pre-gapped, but I a believe in "trust but verify".

thekurgan · 03-02-2015, 08:59 AM

They are supposed to be pre-gapped, but checking the gap on these twin electrode plugs can be tricky as it's measured differently.

http://www.m3post.com/forums/showpos...45&postcount=2

MTM · 03-08-2015, 06:32 PM

I did see that post, but thanks for responding.

I ended up using my wire gap tool to just verify all the gaps were between 34-41 mils (I only had a 0.034 and 0.041 options) on both the new and old. Two electrodes on two of the new plugs were bigger than 41 mils, so a few quick taps on it and they closed to within gap that the rest of them had.

02-28-2015, 10:45 PM	#1
MTM Lieutenant 83 Rep 468 Posts Drives: 2009 M3 Join Date: Sep 2011 Location: Houston iTrader: (1)	Spark Plug Gap I did some searching, and also posted here (http://www.m3post.com/forums/showthread.php?t=796536) but came up with nada... Does anyone know the correct gap for the spark plugs? I know they are supposed to be pre-gapped, but I a believe in "trust but verify".
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03-02-2015, 08:59 AM	#2
thekurgan Bad Lieutenant 232 Rep 3,517 Posts Drives: E90M3 Join Date: Aug 2007 Location: Sacramento iTrader: (0) Garage List 2008 BMW M3 [0.00]	They are supposed to be pre-gapped, but checking the gap on these twin electrode plugs can be tricky as it's measured differently. http://www.m3post.com/forums/showpos...45&postcount=2 __________________ 02 E39M5 \| TiAg/Schwartz \| Tubi Rumore \| Ultimate Ti Pedals \| E60 SSK \| Jim Blanton 3.45 40/100% \| Coby Alcantara \| StrongStrut STB
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03-08-2015, 06:32 PM	#3
MTM Lieutenant 83 Rep 468 Posts Drives: 2009 M3 Join Date: Sep 2011 Location: Houston iTrader: (1)	I did see that post, but thanks for responding. I ended up using my wire gap tool to just verify all the gaps were between 34-41 mils (I only had a 0.034 and 0.041 options) on both the new and old. Two electrodes on two of the new plugs were bigger than 41 mils, so a few quick taps on it and they closed to within gap that the rest of them had.
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