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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 > Sparkplug reading



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      12-14-2020, 05:59 PM   #1
Angelcma
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Sparkplug reading

Hi guys, good evening.
Recently I changed spark plugs, how much can you tell from my engine just by ñooking at them.
Please see the attached image.
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      12-14-2020, 07:13 PM   #2
E92.Dom
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I don't know exactly but I can tell you the gapping is way off, so your engine was probably running pretty bad.
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      12-15-2020, 02:32 AM   #3
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This might help...

https://ngksparkplugs.com/en/resources/read-spark-plug
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      12-15-2020, 07:24 AM   #4
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Quote:
Originally Posted by Angelcma View Post
Hi guys, good evening.
Recently I changed spark plugs, how much can you tell from my engine just by ñooking at them.
Please see the attached image.
I agree that it looks like the gap is a little large, but that may just be the photos.

Other than that it's hard to tell since you didn't list the age. They look pretty normal if they've been in there for 50-100k, although it does look like there was some oil on top of the insulator which may indicate an oil leak.
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      12-15-2020, 10:01 PM   #5
Angelcma
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They have been used for around 50k km
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