The Pentastar 3.6L engine in Dodge vehicles has had two common faults since its introduction in 2011, the first being that advanced exhaust cam phasing can trigger an engine warning light; this has no negative performance effects. The second, more serious, issue is overheating and failure of engine heads.
The cylinder head problem in the Chrysler Pentastar 3.6L engine affects the left bank containing cylinder number two. Symptoms first appear as a ticking sound coming from that cylinder, followed by misfire conditions, loss of power and possible stalling. The design flaw is reportedly fixed in models manufactured from 2012 but it is believed that 7,500 earlier vehicles may be susceptible to left cylinder head cracks. Chrysler has extended the five year/100,000 mile warranty to ten years or 150,000 miles on the left cylinder head of vehicles prone to the failure. Warranty bulletin D-14-12 of June 10, 2014, is available from dealers and contains details of which vehicles are covered.
The 3.6L V6 is the first of the Pentastar family of motors. It comes as the standard engine in the: Dodge Challenger and Charger, Jeep Grand Cherokee and Wrangler, Ram Promaster and 1500, and Chrysler 300. The Pentastar is optional on both the Dodge Avenger and Chrysler 200.