2004 Jeep Grand Cherokee Startup Knock

JEEP CHEROKEE
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RCRICKET20
  • MEMBER
  • 1 POST
I just bought a 2004 Jeep Grand cherokee two weeks ago, ran fine for two weeks. Now when I start it up it knocks really loud for a couple of seconds. it only has 20,000 miles on it! any help would be great
Mar 6, 2006 at 7:08 AM
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JPAM
  • ✓Experienced Mechanic
  • 307 POSTS
were did u buy it from?? dealer, private party? Id bring it back and have them worry about it.. uv only had it for to weeks.. sounds like its not holding any oil in pump at start-up causeing knocking..until oil gets pushed back through engine.. but get it fixed before u have a new paper weight sitting in yard..
Mar 6, 2006 at 9:51 AM
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Suggested Repair

Return the vehicle to the seller if possible and have the startup knock diagnosed promptly. The likely cause is the oil pump not holding oil at startup, so the engine knocks until oil pressure is restored.

Conversation Summary

The owner of a low-mileage 2004 Jeep Grand Cherokee reports a loud knock for a few seconds at startup after two weeks of normal driving. The expert advises returning it to the seller and suspects the oil pump is not retaining oil, causing knock until oil circulates. Prompt repair is recommended to avoid engine damage.

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