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Old 01-25-2014, 01:07 PM
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Spark plug change

Did a plug change a bit early -- 29,500 mi -- since I was having some lope in the idle and reduced MPG. Here's what I found (sorry, best I could do on my phone):





So, not exactly what I would have liked to find. Almost one on every cylinder that has quite a bit of oily residue on the threads. Think this means a valve cover gasket problem? "Normal"?
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Old 01-25-2014, 05:15 PM
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Here's how mine looked. Done at 30,810 mi.
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File Type: jpg image-2643760199.jpg (72.2 KB, 74 views)
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Old 01-25-2014, 08:23 PM
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Re: Spark plug change

Nice, but a pic of the firing ends would be better. Were the center electrodes rounded?
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Old 01-25-2014, 08:35 PM
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Don't have a pic of the firing ends but they weren't rounded. I was merely posting the pic for comparison on the threads with the OP.
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Old 01-26-2014, 11:41 AM
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Re: Spark plug change

The firing ends all look pretty much the same as the first pic. There is a little discoloration, but it's always on one side of the electrode and it's on pretty much all the plugs -- oily threads or not. The second pic is the worst one I have, none of the others look that bad. No electrode rounding on any of them.



(worst one)
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Old 01-31-2014, 08:26 AM
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Re: Spark plug change

Pull your hose off the intake manifold for the PCV valve. Is the hose interior and intake interior full of oil? (You will need a flashlight to see this) If so then thats where your oily plug is coming from. I put a catch can on mine and the oil going into the intake has been greatly reduced and my plugs are not oil covered anymore.
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Old 01-31-2014, 08:22 PM
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Re: Spark plug change

The OP's plugs look fine, to be honest. Yeah, there is a little residue but the can will alleviate that. The burn looks spot on with regards to the electrode.
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Old 02-01-2014, 12:29 PM
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Re: Spark plug change

Thanks, will check PCV. I'm not getting any blue exhaust smoke. As others on the Forum have reported, occasionally get a white smoke puff after parking on an incline and sitting a brief time before restarting. Hasn't done that in a while now.
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Old 02-01-2014, 12:59 PM
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Re: Spark plug change

Hell, I would have cleaned them with a wirebrush and some gasoline and called it good!! LOL

Those plug's don't look bad at all for the mileage, I wish I still had the pics of some of the plugs ive pulled off cars..
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