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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Bosch spark plug gap



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      06-21-2012, 08:27 PM   #1
Teohenwhy
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Bosch spark plug gap

I just picked up some Bosch FR7NPP332 and they are supposed to be pre-gapped. I checked the gap on them and they are all gapped at .045 but I heard these need to be at .040. What do you guys gap these plugs at? Thanks in advance.
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      06-22-2012, 09:30 AM   #2
AlanAZ
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The Bentley says 0.040

http://www.e90post.com/forums/showth...ighlight=bosch

Last edited by AlanAZ; 06-22-2012 at 09:57 AM.
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      06-22-2012, 06:48 PM   #3
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Quote:
Originally Posted by AlanAZ
Weird. I gapped them all to 0.040 and it idled rough. Took them out, gapped them back to 0.045 and idles fine. I read some other members had same issue. Not sure why.
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