Join Date: Dec 2010
Thanked 29 Times in 24 Posts
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Both of my brothers have 2012 Wrangler Unlimited models with the 3.6 Pentastar V6. There was an issue with the 2nd cylinder in the left head failing. This applies to heads that are stamped AA; AB stamped heads were the initial fix, and the AC stamp should the final fix. A ticking sound is the major indicator of a possible failure with the AA heads. Again, this cylinder head issue has been focused on the 2012 JK's with a build date before July 2012.
SHOW - 392 front clip, solid hood T & bumblebee decals, Billet Tech, 3G Customz, S&P, Hurst white ball, WebElectric, Rebadge
WHOA - Hotchkis springs, Petty front brace, REM rear brace, DBA discs/Carbotech pads
GO - TranZformer, (Wavetrac)
FLOW - LMI FIV/S&B, Zoomers, Trinity