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2003 Jeep Liberty Limited 4dr

2003 Jeep Liberty
Trim Info:
2-Wheel Drive, 4 Door, Sport Utility Vehicles
16 mpg city / 22 mpg hwy
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May 4, 2013, 11:07 am

Frankie M

Question: jeep liberty engine knock

I have a 04 Jeep liberty 3.7 170k. I changed the oil with 4 quarts 10w-30 and a quart of Lucas heavy duty oil stabilizer. I instantly ruined a valve lifter and got a top end ping. Took the valve cover off replaced valve lifter, problem Solved. but now I have a low engine knock at idle and when I get in the higher rpms it's a rattling tin like noise. When I'm stopped and my rpms drop to around 600 rpms. My oil light comes on. As soon as I give it throttle it goes away. It only comes on when Im at a low idle

May 5, 2013, 4:10 pm

Richard W
Expert Mechanic

When you have low oil pressure at idle it means that the bearing in the engine are going out. I would check the engine oil pressure with a gauge. If it reads low you need new bearings for the lower end.

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