The Hemi in my '04 Durango was running great at 135k miles. Left Home Depot one day, made a left at the next stoplight and it coughed and stalled. Popped it in N and cranked it back up, but it had a miss and was smoking from under the hood. Called my towing guy to bring a rollback, drove it on, started it up before we unloaded it at the house, looked at the engine from underneath and saw a hole in the right side of the block. I drove it into the garage to swap the engine. Number 5 rod broke and punched windows in BOTH sides of the block just above the pan rail. No coolant or oil leaks. I've got 2 other Hemis now, one with 217k. Same plan, drive it until it pops and swap it out.
What happens on that era (2004-2006) Durango is that water runs down off the cowl and drips on the intake and when the engine has over 100k miles it seeps past the intake port o-ring and ends up in a cylinder.
It hydraulic locks that cylinder on start up and the powder forged rods break and sometimes split out the side of the block.
When I bought a really clean 2004 Durango that had done that is when I got educated on how often it happens.
Search the internet and you see it's pretty common, usually after a hard rainstorm.
