Here are pics from the factory AC Delco plugs out of my 2012 Verano with right at 60k on them. I replaced them with another set of OEM Delco Iridium.
2012 Buick Verano 2.4 60k OEM Spark Plugs Pics
- Thread starter JasonC
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Two look white, two look tan. Interesting.
I think it's always good with aluminum heads to change (or at least r & r) plugs at an earlier interval than the 100,000 mile mark to make sure the threads aren't seized.
I think it's always good with aluminum heads to change (or at least r & r) plugs at an earlier interval than the 100,000 mile mark to make sure the threads aren't seized.
Those cars are endless moneypits as they age. Too weird to see a modern car needing sparkplugs by 60k miles. Good decision on putting iridium ones.
The difference in color must be due to temperature, no?
Probably or a major vacuum source is near those cylinders. I would love to see an engine with a A/F monitor on every cylinder just to see what the different effects are.
It would also allow the ecm to tweak each cylinder individually. The drawback is cost.
It would also allow the ecm to tweak each cylinder individually. The drawback is cost.
60k miles on a set of Iridium? Those were just getting broken in. In fact, the electrodes, while 'dirty', look barely touched.
The PCV system on these ecotecs pull crankcase vapours into the intake manifold right where it bolts to the head. The orifice is between cylinders 2 and 3. Maybe this could account for the different color of two of the plugs but it looks like plug 3 and 4 are the darker ones unless they have been mixed up.
I replaced them as PM rather than them needing them. With the rebate I only have like $2 per plug.
Originally Posted by SirTanon
60k miles on a set of Iridium? Those were just getting broken in. In fact, the electrodes, while 'dirty', look barely touched.
Originally Posted by SirTanon
60k miles on a set of Iridium? Those were just getting broken in. In fact, the electrodes, while 'dirty', look barely touched.
Originally Posted by JasonC
I replaced them as PM rather than them needing them. With the rebate I only have like $2 per plug.
Originally Posted by SirTanon
60k miles on a set of Iridium? Those were just getting broken in. In fact, the electrodes, while 'dirty', look barely touched.
Fair enough. Realistically, though, those plugs could have probably gone at least twice as many miles, if not triple.
I replaced them as PM rather than them needing them. With the rebate I only have like $2 per plug.
Originally Posted by SirTanon
60k miles on a set of Iridium? Those were just getting broken in. In fact, the electrodes, while 'dirty', look barely touched.
Fair enough. Realistically, though, those plugs could have probably gone at least twice as many miles, if not triple.
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