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Old 07-05-2013, 09:31 AM
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Check engine light FYI

Light came on at 30,500 mile on my 2012 Grand Cherokee 3.6L. I took it to the dealer and a code noting number 2 cylinder misfire was present. Dealer said that there was a bad set of 3.6L cylinder heads machined with the valve seat depth wrong and over time would not seat properly causing a misfire. This made sense as it did develop a rough idle.
Dealer replaced the entire head, light is out and it idles smooth.
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Old 07-05-2013, 09:40 AM
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Re: Check engine light FYI

They've been replacing those heads for quite a while now.

V6 Cylinder Head Failure
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Old 07-05-2013, 09:06 PM
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Re: Check engine light FYI

Wondered if that would resurface with warm weather.
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