Engine Knocking Noise problems of the 2007 Jeep Wrangler

There is an issue with the valve lifters that cause a ticking or knocking sound while stationary & in motion. Worse while in motion, we have been told by two different mechanics that to repair the issue the engine has to be disassembled.

While driving on the highway, a loud knocking sound began to come from my engine compartment. As I slowed to exit (at the next interchange) the 3. 8l v6 engine had a bearing seize and threw a rod out the bottom of the engine block. From the research that I have done this is not an isolated incident for Chrysler. There have been many reports of this engine failing even with impeccable maintenance. I received no indications or warnings prior to the engine blowing. Just as I slowed down the oil pressure indicator light illuminated but at that point it was too late.

Had to add oil at nearily every fillup. The dealer said that was normal to add oil every 1000 miles!!! ended up short on oil, oil light never went on and trashed engine. It made a horrible knocking noise. I replaced it at a cost of $6118 as the car only had 49560 miles on it.

My 2007 Jeep Wrangler 4-door sahara unlimited has experienced lower block defect with symptoms of large knocking noises. The oil had been changed regularly and without notice or low oil light indicator, at 75k miles, the engine is useless. Apparently, Jeep dealers are repairing several of these defects although I see no other complaints at this site.

I bought the Jeep new in February/March of 2007. In December 2009, at approximately 45k miles, I heard a loud knocking noise that sounded like it was coming from the bottom end of the engine. Took the Jeep to my regular oil change center and they confirmed the knocking sound. I then took the Jeep to local dealer who informed me that it was spun bearings and there was metal shavings in the oil pan. They put in a new motor (Chrysler offered some assistance after much complaining and arguing on my side, but it still cost me $1,500 as it as out of warranty). Now, in August 2012, at a total of 90k miles (approximately 45k on the new motor), the bearings are spun again. This will be the 3rd motor in this Jeep. I have the receipts from my regular oil change center showing that I have regularly changed the oil. The service department at the dealer says they are not aware of any other ppl having this issue. However, internet research shows significant numbers of ppl with 2007 Jeep Wranglers that are having spun bearings at around 45k miles. Jeep should be replacing these motors at no cost to the consumer as this appears to be a design defect.