JKWrang

If Chrysler did the engine swap theyll have records of it. And an accredited shop elsewhere should have been equipped to report it i believe. So youd have a car fax report wouldn't you? I could be wrong. But even if it has been replaced... why so concerned? Your JK runs great and that's what matters :(

Jiblet

you could start with the engine number (see post 5).
https://www.jk-forum.com/forums/stoc...ng-jks-217640/

That might give some info. I'm guessing the original owner can't be reached or trusted for some reason??

DeucesALLin

Car fax is TOTALLY clean on my Jeep... Its just so I know the actual MILES on this engine. I count my blessings DAILY with this thing, and plan to drop in a balanced and meticulously assembled short block with aftermarket Hyperutectic pistons and hand filed rings when its time.