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ChetLori 07-05-2013 09:31 AM

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.

bill_de 07-05-2013 09:40 AM

Re: Check engine light FYI
They've been replacing those heads for quite a while now.

padgett 07-05-2013 09:06 PM

Re: Check engine light FYI
Wondered if that would resurface with warm weather.

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