[robbyr]

i bought a 1993 jeep wrangler yj from a mechanic i've been using for a while
the truck is pretty hooked up with tires, lift kits, armor, and a beast brush guard. the truck has 120,000 miles on it. Straight 6

about 2 months after i purchased the truck i was in 4 wheel low doing some very low key offroading. i hit a bad bump got a bit of air and when i came down the engine was making a rattling noise. once checked out it turns out i blew a piston rod and needed a new engine. it was worth it to get one because of all the money put into the truck. i got the new engine (not brand new, it came out of a 2002 wrangler with 40,000 miles great condition) and no more than two weeks later while driving in 4 wheel high in the rain the same exact thing happened. same piston in the new engine. could i be doing something wrong or is it possible the truck is a lemon? the engine was insured but i still need to pay to have it installed. is it worth it?

 

[mholloway1809]

How many RPM's did you turn ?

 

[robbyr]

on the first engine while i was in the air for that split second i was barely even giving it gas, but not sure how much exactly

on the second engine i was driving normally couldn't have been over 3000 rpm

 

[mholloway1809]

If you didnt overrev the engine or run it low on oil i think its possible the previous owner might have.
A 2002 jeep engine with only 40k on it, must have came from a wrecked jeep with serious damage.
Second, never buy a mechanic's personal vehicle. its the one that never gets fixed right.