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12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.Thanks for your advice! I checked the spark plugs and they’re all tight. Checked with a stethoscope and it’s not sounding like an... -
12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.Also the AFM system isn’t active. I should have mentioned that. I noticed when I bought it that it stays in V8 mode all the time.
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12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.I pulled the spark plug from that cylinder today actually. It was in pretty tight.
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12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.I went out and got a mechanics stethoscope and I’ve narrowed down where the noise is coming from I think. I can hear it best on the...
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12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.I use 5w30 Mobil One synthetic with an ACDelco filter. Here are some pictures of the driver side. I didn’t stop to take pictures of the...
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12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.Took off the passenger side valve cover and did the same thing. Everything looks okay nothings loose and everything is moving as it...
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12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.Took the valve cover off tonight. None of the rockers feel loose at all. Turned the engine over manually and couldn’t find any slack or...
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12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.What should I look for once I get the valve cover off?
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12XLYukon replied to the thread 2012 Yukon 6.2 Engine Noise.No misfires codes. Engines seems to run smooth.
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Hi all, I just recently bought a 2012 Yukon XL Denali with the 6.2. It has developed a noise that I can’t identify. It has 214k on the...
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