2008 Jeep Liberty Engine Failure
Found this in an austrailian Jeep forum. I showed it to my mechanic friend and he said either oil starvation, over-revving or camshaft mod failure can cause that:
2008 Jeep Liberty w/63,000 miles. Broke cylinder #4 intake valve spring, which caused the rocker arm to become jammed between the lifter and the cam. Result..... Note this is the 3rd late model Chrysler product this year breaking valve train components and ruining heads. The other 2 were Hemi's.
2008 Sport Liberty
Cold air intake*Trush (magnaflow) turbo muffler* Hypertech power program*
Hood Prop mod. Battery Quick Release mod.
Resonator removed (sounds like a V8 on start up)