I just addressed this question in another forum. The GEMA engine was a joint effort of Hyundai, Kia, and Chrysler. To keep it simple, it was the main engine block that was jointly designed, and then each mfg. added the "rest of the engine" designed to their specs and needs. So, each mfg. final engine assembly was not identical. Their mfg. goal in Dundee Michigan was to build this engine cheap and reliable.....they hit that goal on the nose.
My professiond MOPAR Jeep mechanic friend told me that after Chrysler absolved the joint project (buying out entire rights), under Fiats new ownership they made a few improvements to an already good engine.
If you google "Jeep GEMA 2.4 engine problems" you come up with zilch. I found one engine rebuilding site that says the engine will wear out, but that catastrophic failures are rare to non existent.
For perspective, Google "Insert brand here...engine problems" and see the thousands of hits you come up with. Subaru....ouch, Honda, GM, Ford, Toyota....the same results.
The fact that you get no Google hits for the Chrysler GEMA 2.4 engine problems is astounding. Try Chrysler 2.7 engine and it's another story.
Anyway, this is a very good indication that this engine is rock solid. The only complaints deal with it being a somewhat "doggy" engine, it doesn't achieve the power that it should, and that it is a bit lacking in refinement and performance, i.e. - it's a bit noisy.
I can live with its attributes. Reliability and low ownership costs are more important to me.
Again, Google "GEMA 2.4 Engine Problems" and then "Subaru engine problems".........don't fall off your chair.
Last edited by Redpine; 01-08-2014 at 09:17 AM.