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post #1 of 11 (permalink) Old 11-10-2013, 01:14 AM Thread Starter
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Should I be worried?

So yesterday I was checking my spark plugs and noticed that they all had a burn looking pattern on the I guess porcelain part of the plug, is this something that I should be worried about? I included a picture of one of the plugs for reference, all of them looked like this:

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post #2 of 11 (permalink) Old 11-10-2013, 01:21 AM
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Looks like u should change em.. how many miles you had em in with?
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post #3 of 11 (permalink) Old 11-10-2013, 03:55 AM
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You may have over-torqued them, but I don't think you need to worry. I've read in the past that doing so can break the seal between the threads and porcelain allowing combustion gases to pass.

What does the firing end look like?

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post #4 of 11 (permalink) Old 11-10-2013, 05:53 AM
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The grey powdery look on the electrode means you're getting a good combustion, so no need to worry on that end. ACDelco Iridiums are supposedly good till 100k miles before needing replacement (in the best of conditions of cours)

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post #5 of 11 (permalink) Old 11-10-2013, 06:46 AM
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brown color on the ceramic portion is
normal...nothing to worry about.

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post #6 of 11 (permalink) Old 11-10-2013, 02:53 PM Thread Starter
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Awesome since I don't need to replace them yet, it's just I'm so used to non iridium spark plugs and this I had never seen before, and I've got almost 80k miles on em so not bad at ask all

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post #7 of 11 (permalink) Old 11-10-2013, 03:15 PM
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You know what, I would change them if they have 80,000 miles. Better to be safe than sorry. Would you rather be safe or here " I'm pregant" and having to say your sorry. The point I'm trying to make is why wait until you have a problem with some obviously tired plugs that could bring upon you so many more problems like clogged cat dirty HO2s carbonized chambers, low fuel efficiency when a $30 set of spark plugs can avoid all these frustrations. It is called preventative maintenance.

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post #8 of 11 (permalink) Old 11-10-2013, 03:26 PM Thread Starter
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Good point the only thing is that I've been wanting to put e3 plugs but I've never heard a Cobalt having them

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post #9 of 11 (permalink) Old 11-10-2013, 03:32 PM
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Stay away from E3 plugs with the Cobalt, stick to what you know works. I've heard nightmares about E3 plugs. Maybe I can give you my brothers phone number if you really want an earfull. In an outboard motor maybe where you have to change the plugs regularly anyways but only trust ACDelco iridium in your Cobalt.

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post #10 of 11 (permalink) Old 11-10-2013, 05:36 PM
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Quote:
Originally Posted by Cherry GT View Post
brown color on the ceramic portion is
normal...nothing to worry about.
This.
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