Question about 2001 Jeep Grand Cherokee

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Engine knocking engine has a loud knocking. sounds like its coming from the top

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  • dman556 Mar 23, 2009

    I'm having a similiar problem. Have an 01 Jeep Grand Cherokee Laredo 4.0. The other day i just started hearing a knocking sound coming from the FRONT of the motor, very close to the alternator area.

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Valve lifters or push rods need replacing or tightening. Refer to repair manual before servicing.

Posted on Mar 05, 2009

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Lifters pushrods


Hi Jack, Is the sound constant through the entire rev range or does it come and go? If the knocking is constant there is a probability it is caused by incorrect and loose valve adjustments. If the sound comes and goes it will most likely be a defective bearing, if the sound is from the top of the engine, it could be a dudgeon pin bearing (Otherwise known as a small end bearing) It connects the piston to the connecting rod. However there are many other components which may result in similar sounds. Regards John

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