Question about 2002 Jeep Grand Cherokee

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Knocking sound from my 4.7 jeep gc

What caused this problem? how much is going to cost me?

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  • pbalatidis19 Dec 16, 2008

    It coming from the passenger side engine. I used some seafoam today and it getting more quiet. I think that it might be the lifters, the car still has alot of power.

  • pbalatidis19 Dec 16, 2008

    Thank you for your response. its an '01 4.7 with 256k. i'll have to do a professional engine flush and I'll change the oil to a higher grade of oil.

    thanks again for your responsde

  • Ken Wolter May 11, 2010

    Please clarify where the knocking is coming from (engine, transmission, drive train, suspension, steering and so on.)  There are literally hundreds of different knocks that a vehicle can make.  Without hearing the vehicle first hand there is no way to diagnose the problem accurately.



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Glad to hear it got more quiet, the Seafoam product has a very good reputation. Under most circumstances a little lifter noise is something that comes with age and is not necessarily something that needs to be fixed right away unless the noise gets loud enough or is affecting performance.  What is the year of your GC and how many miles does it have?  Make sure you get oil changes at the recommended intervals and check your oil level often to avoid a harsher knock. I would recommend having an oil flush done with the next oil change, you may want to move to a higher grade of oil or a synthetic to help avoid further noise. As far as you question of price to fix, for now, stick to treating the problem with the above recommendations because there may not actually be damage yet, alot of engine noise is just its way of telling you it needs some TLC (oil changes and such)

Posted on Dec 16, 2008


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